Place in a single layer on a large baking sheet and cook for 25-30 minutes or until the potatoes are cooked through and lightly browned.
Meanwhile combine the fresh parsley, mustard, lemon juice, salt, and pepper in a large mixing bowl.
2 tablespoons chopped fresh parsley, 2 teaspoons Dijon mustard, Juice of half a lemon, Salt and pepper to taste
Transfer the hot, cooked potatoes to the bowl and toss with the mustard and lemon juice mixture.
Notes
Be sure to spread the potatoes out in a single layer on the baking sheet. If they’re crowded, they’ll steam instead of roasting and won’t get that nice golden edge.
Whole garlic cloves mellow as they roast, so don’t worry about them being too strong. They’ll add a gentle, savory flavor to every bite.
Toss the potatoes with the dressing while they’re still hot. The warmth helps them soak up all that bright mustard and lemon flavor.