Mushroom Spinach Manicotti

1 TBSP olive oil or butter
1 onion, diced
2 (or more) garlic cloves, minced
8oz (or more) sliced mushrooms
4 cups torn up spinach leaves
1 (16-24 oz) container cottage cheese
1 egg
1 package manicotti noodles
1 26 oz jar tomato basil pasta sauce
1/2 - 1 cup Parmesan cheese

Cook manicotti noodles according to package instructions.

Saute onion, garlic, and mushrooms in oil or butter until soft, then add spinach and cook until spinach is wilted. Mix cottage cheese and egg together, then add mushroom mixture. Using your fingers, fill the manicotti noodles and place in a greased 9x13 pan. Cover the noodles with any leftover filling, then cover with the pasta sauce. Top with cheese. Cover and bake at 350 for 40 minutes. Uncover and bake or broil for 5 minutes.