Preheat the oven to 350 degrees f and spray a 13x9 inch pan or casserole dish with non-stick cooking spray.

Chop green peppers, mushrooms, and onions into small pieces, slice black olives.

In a large saucepan cook pasta in salted water to al dente according to package directions. Drain and return to pan, pour an entire jar of pasta sauce over the pasta and stir to coat.

Meanwhile, heat olive oil in a large skillet over medium high heat. Add in chopped green pepper, onion, and mushrooms. Sprinkle with a pinch of salt and saute over medium heat for about 5-10 minutes or until onions are clear and veggies are slightly softened.

Add ground beef and continue cooking over medium heat, stirring frequently brown ground beef until it is completely cooked. Drain to remove any excess fat.

Add ½ of a jar of pasta sauce to the meat mixture and stir until everything is well coated. Add in shredded Parmesan and stir to incorporate.

Next spread the pasta evenly across the bottom of your prepared pan.

Then spread the meat mixture evenly across pasta.

Spread the remaining 1/2 jar of sauce evenly across the meat mixture.

Sprinkle the shredded mozzarella evenly across the top.

If desired spread pepperoni, chopped green peppers, sliced olives and sliced mushrooms across the top of the cheese.

Bake for 25-30 minutes, or until cheese is completely melted.