Easy Lasagna

2 small packages frozen large cheese filled ravioli 

1 package frozen spinach 1 cup cooked ground beef (optional) 

1 jar spagetti sauce 

Cheese  

In baking dish, layer spagetti sauce, ravioli, spinach, beef and cheese until baking dish is full. Then layer with grated cheese. Bake uncovered in oven at 350 degrees until bubbly.