Three-Cheese Chicken Penne Florentine

Preheat oven to 425°. Heat olive oil in a large nonstick skillet coated with cooking spray over medium-high heat. Add mushrooms, onion, and bell pepper; sauté 4 minutes or until tender. Add spinach, oregano, and black pepper; sauté 3 minutes or just until spinach wilts. Place cottage cheese in a food processor; process until very smooth. Combine spinach mixture, cottage cheese, pasta, chicken, ¾ cup cheddar cheese, ¼ cup Parmesan cheese, milk, and soup in a large bowl. Spoon 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 at 425° for 25 minutes or until lightly browned.