Spinach and Cheese Casserole is one of my favorite side dish casseroles. It's creamy, rich and so cheesy with tons of spinach. This casserole is so easy to assemble. Pop it in the oven for about an hour and it is ready to serve.
Preheat oven to 350 degrees and grease a 7x11-inch baking dish.
Melt butter in a medium nonstick skillet. Add onion and cook for 3 to 4 minutes to soften. Add garlic and cook 1 more minute. Remove from heat and let cool.
In a large bowl, stir together cottage cheese, mayonnaise, eggs, flour, salt, pepper, and hot sauce. Add onion and garlic.Once well mixed, stir in spinach and 2 1/2 cups cheddar cheese.
Transfer to prepared baking dish. Sprinkle remaining cheese on top. Bake for 55 to 60 minutes.