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, 3/4 cup cheddar cheese, 1/4 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 1/4 cup cheddar cheese and remaining 1/4 cup Parmesan cheese. Bake at 425° for 25 minutes or until lightly browned and bubbly.
You can cook the pasta mixture in individual eight-ounce ramekins; bake for 15 minutes.
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