Preheat oven to 350 degrees.
In a medium skillet brown the ground beef with the garlic and Italian seasoning. Drain excess fat.
Reserve 1 cup of the spaghetti sauce and set aside. Add the remaining sauce to the browned ground beef. Stir and heat through.
In the bottom of a 9x13 pan spread ½ cup of the reserved spaghetti sauce.
Now begin the layering. First using one-third of the ravioli make a single layer over the sauce.
Next top with half of the ground beef.
Next, sprinkle with ½ cup of mozzarella cheese.
Next, make a single layer of the ravioli over the cheese.
Top with the rest of the ground beef.
Sprinkle ½ cup of mozzarella cheese.
Place the final one-third of the ravioli on top.
Top with remaining ½ cup of reserved spaghetti sauce.
Sprinkle with remaining one cup of mozzarella cheese.
Bake the casserole at 350 degrees for 30-40 minutes or until cheese is completely melted and the casserole is bubbling around the edges.
Garnish and serve.