Brown ground beef

Mix ricotta, mozzerella, spinach, and garlic powder in a large bowl.

In a 9x9 glass baking dish put 1 layer of lasagna noodles

Put a thin layer of the cheese mixture + 1/3 of the pasta sauce + 1/3 of the cooked ground beef

Repeat step 4 with 2 more layers

Top the last layer with tomatoes and sprinkle a little more mozzerella

Cover with aluminum foil and bake at 400°F for 45 minutes

Uncover and cook an additional 10-15 minutes