Cook gluten-free pasta according to package directions. Reserve ¼ cup pasta water.
In a large pan, heat olive oil. Sauté onion and peppers 3–4 minutes.
Add mushrooms and cook until golden and softened.
Stir in garlic and cook 30 seconds.
Blend cottage cheese until smooth.
Add drained pasta to the pan. Stir in blended cottage cheese and a splash of reserved pasta water until creamy.
Season with salt and pepper.