Preheat oven to 400°.
Combine first 7 ingredients in a bowl. Place 2 tortillas in an 11 x 7-inch baking dish coated with cooking spray. Spoon half of corn mixture over tortillas. Top with 3/4 cup cheese. Repeat layers; end with cheese. Bake at 400° for 15 minutes. Let stand 2 minutes. Top each serving with 1 tablespoon yogurt.