Bubble-Up Hamburger Casserole is the casserole version of the beloved American hamburger. Instead of a bun, this recipe calls for biscuits that will "bubble up" during the baking process. A ground beef mixture lies on top of the biscuits and the finishing touch is, of course, cheese. This hamburger casserole recipe is very easy to put together, so it can be made during the week. If you don't feel like making patties and opening up the grill, this casserole is here for you. It has the same components but doesn't require as much work.
Preheat the oven to 350 degrees F.
Spray a 9-by-13-inch casserole dish with cooking spray.
Cut the biscuits in quarters with kitchen shears. Layer them in the casserole dish.
Brown the ground beef. Drain the grease. Add the onions, tomatoes, water, chili powder, and salt. Mix together. Cook for 5 minutes. Add the spinach and mix. Pour the mixture into the prepared casserole dish.
Bake for 25 minutes. Layer the cheese on top and bake for an additional 10 minutes.