Posted on 01.25.18Squash Casserole An easy and simple keto friendly squash casserole! Only 4 ingredients!Check out more keto friendly -> RECIPES Squash Casserole Print Recipe Squash Casserole Print Recipe Ingredients 4 medium Yellow Squash 1 medium yellow onion 3/4 stick butter Parmesan cheese Servings: Instructions Cut squash into thin slices. Cut onion into medium slivers. Layer squash, onion, pats of butter, add a little salt and pepper, sprinkle with Parmesan Cheese, then keep layering until you've used all the ingredients. Cover with foil and bake at 350 for 45 minutes to an hour.