Make the dressing – combine the yogurt, sour cream, lemon juice, blue cheese, salt and pepper in a small bowl. Stir until well combined. Add enough milk or cream to create the consistency you like. Set aside.
Toast the almonds – Preheat the oven to 350 degrees. Place the almonds in a single layer on a baking sheet and cook for 8-10 minutes or until lightly browned. Check after about 6 minutes and watch closely to prevent burning. Remove from oven and set aside to cool.
For each serving, place a sliced pear atop a lettuce-lined salad plate. Drizzle with dressing. Sprinkle with toasted almonds and additional crumbled blue cheese.