Heat oven to 375°F.
To make the tomato sauce, heat the olive oil over medium hight heat. Add the ground beef along with the onions and garlic; and cook until beef is well browned. Drain any fat.
Stir in any additional vegetables you’re using like mushrooms, green peppers and tomatoes. Add the pasta sauce, tomato paste and basil. Season with Italian seasoning, salt and pepper. Simmer for 5-10 minutes.
Add 1 cup of the tomato sauce to a 9x13 baking dish and spread evenly. Top with 3-4 sheets of lasagna noodles. Layer with 1/3 of the ricotta cheese and mozzarella cheese and 1/3 cup of the remaining tomato sauce. Continue for 2 more layers, and finish with noodles topped with sauce and the remaining cheese.
Cover with foil and bake in the preheated oven for 30 minutes. Remove the foil, and bake an additional 10 minutes or until the cheese is golden and bubbly.
Let rest for 15 minutes before cutting.