Heat the olive oil in a large nonstick skillet coated with cooking spray over medium-high heat. Add the mushrooms, onion and bell pepper to the pan and sauté 4 minutes or until tender. Add the spinach, oregano, and black pepper, sautéing 3 minutes or just until the spinach wilts.
Place the cottage cheese in a food processor; process until very smooth. Combine the spinach mixture, cottage cheese, pasta, chicken, ¾ cup cheddar cheese, ¼ cup Parmesan cheese, milk and soup in a large bowl. Spoon the mixture into a 2-quart baking dish coated with cooking spray. Sprinkle with remaining ¼ cup cheddar cheese and remaining ¼ cup Parmesan cheese.
Bake for 25 minutes or until lightly browned and bubbly.
Notes
Full fat cheeses can be used in place of the low fat cheeses in this recipe, if desired.
Ricotta cheese may be substituted for the cottage cheese.