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Potato Spinach and Tomato Gratin

Potato Spinach and Tomato Gratin – a delicious, cheesy gratin made with sliced potatoes, fresh spinach, and tomatoes. Great weeknight side dish.

Potato Spinach and Tomato Gratin - a delicious, cheesy gratin made with sliced potatoes, fresh spinach, and tomatoes. Great weeknight side dish. https://www.lanascooking.com/potato-spinach-tomato-gratin/

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If you’re like me, sometimes the hardest part of meal planning is coming up with interesting side dishes. I can get the entree – no problem! – but the sides sometimes stump me. Especially if you’re serving little ones whose faces don’t always brighten at the prospect of “eating their vegetables.”

Even with the pickiest eaters, the one side you can almost always depend on is potatoes isn’t it? Really, how many people do you know who don’t like potatoes? I can’t think of one.

I was very pleased to be offered an opportunity to create this recipe using Simply Potatoes brand products. They’re one of my go-to grocery items and I’ve been using them for quite a long time. They’re fresh potato products, never frozen, that you’ll find in your grocery store’s dairy section. And the very best thing? The prep is already done for you! No peeling, slicing, or shredding required. That can be a real plus for a busy household!

I use Simply Potatoes for lots of recipes from breakfast to brunch to dinner. Some of our favorites are the hash browns which make frequent appearances on our weekend breakfast table and the mashed sweet potatoes that I often serve with pork chops or roasted chicken.

For this recipe, I used the Simply Potatoes Homestyle Slices layered with fresh spinach, tomatoes, and cheddar cheese to make a very kid-friendly side dish. With all that cheese and potatoes, the kids will hardly know you sneaked in a whole bunch of nutritious spinach :-)

How to Make Potato Spinach and Tomato Gratin

 Preheat the oven to 350 degrees.

Sliced tomatoes on a cutting board.

Slice the tomatoes into approximately 1/4” slices. I strongly recommend using Roma tomatoes for this recipe. They typically have fewer seeds and less juice than other tomatoes. They’ll help keep your gratin from becoming watery.

Chopped green onions on a cutting board.

Chop the green onions using all the white and the tender green parts.

Baking dish with drizzled olive oil in the bottom.

Drizzle half the olive oil in a baking dish or gratin dish.

Sliced potatoes in bottom of a baking dish.

Place half the potato slices in an even layer in the dish. Lightly sprinkle with salt and pepper.

Half the tomato slices layered over the potato slices.

Layer half the tomato slices. Sprinkle with half the oregano and lightly salt and pepper each slice.

Potato and tomato slices topped with green onions in a baking dish.

Layer half the green onions over the tomatoes.

A layer of spinach added to the baking dish.

Make a layer with the spinach. Lightly sprinkle with salt and pepper.

Half the grated cheese layered over the spinach in the baking dish.

Cover evenly with half the grated cheddar cheese.

Finished layering of vegetables in the baking dish.

Repeat making layers with remaining ingredients. (Note: you’ll use all the spinach in its one layer so your final layers will be potatoes (seasoned), tomatoes (seasoned), onions, cheese.) Drizzle top with remaining olive oil.

Cover with foil and bake for 40 minutes.

Grated Parmesan cheese on a board.

When the baking time is nearly complete, grate the fresh Parmesan. Remove the foil and top with the grated Parmesan cheese. Return the dish to the oven and bake for an additional 10 minutes.

Allow to cool for 5-10 minutes before serving.

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Lana Stuart.

Questions? I’m happy to help!

If you have more questions about the recipe, or if you’ve made it and would like to leave a comment, scroll down to leave your thoughts, questions, and/or rating!

Thanks so much for stopping by!

Potato Spinach and Tomato Gratin - a delicious, cheesy gratin made with sliced potatoes, fresh spinach, and tomatoes. Great weeknight side dish. https://www.lanascooking.com/potato-spinach-tomato-gratin/

Potato Spinach and Tomato Gratin

Layers of potatoes, spinach, tomatoes, and cheese make a delicious and family-friendly gratin. Great side dish for almost any meal.
5 from 2 votes
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Course: Side Dishes
Cuisine: American
Prep Time: 10 minutes
Cook Time: 50 minutes
Total Time: 1 hour
Servings: 8 servings
Calories: 278kcal
Author: Lana Stuart

Ingredients

  • 2 Roma tomatoes
  • 4 green onions diced
  • 3 tablespoons olive oil
  • 20 ounces peeled, sliced potatoes (recommend using Simply Potatoes Homestyle Slices)
  • Salt
  • Ground black pepper
  • 2 teaspoons dried oregano
  • 3 ounces uncooked baby spinach
  • 8 ounces sharp white cheddar cheese grated
  • 1 cup grated Parmesan cheese

Instructions

  • Preheat the oven to 350 degrees.
  • Slice the tomatoes into approximately 1/4” slices. Chop the green onions using all the white and the tender green parts.
  • Drizzle half the olive oil in a baking dish or gratin dish. Place half the potatoes slices in an even layer in the dish. Lightly sprinkle with salt and pepper. Layer half the tomato slices. Sprinkle with half the oregano. Layer half the green onions over the tomatoes. Make a layer with the spinach. Lightly sprinkle with salt and pepper. Cover evenly with half the grated cheddar cheese.
  • Repeat with remaining potatoes, tomatoes, onions, and cheese.
  • Cover with foil and bake for 40 minutes.
  • Remove the foil and top with the grated Parmesan cheese. Return the dish to the oven and bake for an additional 10 minutes.
  • Allow to cool for 5-10 minutes before serving.

Notes

Nutrition Information

Serving 1 | Calories 278kcal | Carbohydrates 15g | Protein 14g | Fat 18g | Saturated Fat 9g | Polyunsaturated Fat 1g | Monounsaturated Fat 8g | Cholesterol 41mg | Sodium 382mg | Potassium 461mg | Fiber 2g | Sugar 1g | Vitamin A 1588IU | Vitamin C 20mg | Calcium 376mg | Iron 1mg

Nutrition information is calculated by software based on the ingredients in each recipe. It is an estimate only and is provided for informational purposes. You should consult your healthcare provider or a registered dietitian if precise nutrition calculations are needed for health reasons.

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— This post was originally sponsored by Simply Potatoes.

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27 Comments

  1. I’ve never tried Simply Potatoes! Inspired to give it a go…..

    Miss P

  2. Melissa from HungryFoodLove.com says:

    This dish idea is brilliant! I also have issues with coming up with new ideas, so thanks!

  3. Carol at Wild Goose Tea says:

    I hear you about side dishes. This is delicious and wow talk about easy.
    I love potatoes. I eat a lot of them. I am always on the outlook for new
    ways to use them. Simply Potatoes looks like a great product to have in one’s bag of tricks.

  4. Kim Beaulieu says:

    My son would absolutely flip out for this dish. He brought potatoes gratin to Thanksgiving with his friends. Proud of that boy.

  5. Angie | Big Bear's Wife says:

    Simply potatoes are awesome aren’t they! You made a wonderful meal with them!

  6. Colleen (Souffle Bombay) says:

    MMM love the tomato, scallion, potato combination you have going on here!

  7. Aly ~ Cooking In Stilettos says:

    This gratin looks amazing Lana! I love the flavor combination and Simply Potatoes – they are a must have in the freezer – love them!

  8. Crystal Barrett says:

    I LOVE Simply Potatoes! This looks great! Would probably even be a good breakfast!

  9. Sarah Walker Caron (Sarah's Cucina Bella) says:

    This looks incredible — such cheesy goodness! And I love how simple it is to toss together. Mmm.

  10. I love a good gratin! Beautiful colors!

  11. Sara // Simply Happenstance says:

    Oh my goodness, Lana! This dish look delectable! Love the added spinach!

  12. christine says:

    This is a great gratin. What a nice shortcut using those simply potatoes!

  13. Ashley @ Wishes & Dishes says:

    I’m constantly stumped by side dish ideas…so glad I’m not the only one! Main course is no problem for me but I never know what to make on the side. Thanks for the idea!

  14. Jessica (Savory Experiments) says:

    I had no idea you could get pre-sliced potatoes. Wow, how many easier are gratins now??

    1. Lana Stuart says:

      Yes! Simply Potatoes has these lovely sliced potatoes and shredded ones for hash browns, too. They’re so convenient to have on hand!

  15. The Food Hunter says:

    love your casserole dish

  16. Erin @ Texanerin Baking says:

    This looks WAY easier than that gratins I’ve been making! I definitely need to give this a try. :)

  17. Stephanie @ Back For Seconds says:

    I mean, can you go wrong with anything “gratin”? Looks awesome!

  18. Rebecca Cooper says:

    These look delicious!! pinning for later. :)

  19. Lana, this looks super yum and not just for kiddies! I love using the Simply Potatoes and not using my mandolin or shredder. Thanks for this recipe.

  20. Looks delicious. Thank you.

  21. Heather // girlichef says:

    Oh, yes – we love Simply Potatoes. And au gratin potatoes are one of our favorite side dishes (though I can eat it like it’s an entree) – love this spruced up version!

    1. Lana Stuart says:

      I think this recipe would actually make a very good vegetarian entree, Heather.

  22. Paula - bell'alimento says:

    Who doesn’t love a good cheesy gratin!

  23. I love that there are potatoes, tomatoes, and spinach in this dish!! And the cheese, too, obviously :)

  24. Cookin Canuck says:

    I find that side dishes often become the star of the meal, outshining the entree. I say we go to meals of all side dishes! This gratin looks wonderful!

    1. Lana Stuart says:

      I couldn’t agree more, Dara. I often find myself pushing the entree away and taking larger portions of the side dishes!