While noodles are cooking, brown sausage and hamburger in a pan. Add pepperoni the last few minutes of cooking the hamburger/sausage. Drain the grease from the meat.
Also while noodles are cooking, saute vegetables of choice (if any) to add to casserole.
Add pizza sauce and vegetables to the meat mixture. Season with salt pepper and sugar. Warm for about 5 minutes. Toss noodles into the meat/sauce mixture.
Spray a nonstick cooking spray into a 9x13 casserole dish. Pour the mixture into the dish. Top with enough mozzarella cheese to cover the casserole. [The more cheese the better :-)!!]
Bake for 20-30 minutes at 350* (until bubbly).
You can make this as simple or as complex as you desire. IF you go for the simpler route (noodles, hamburger, pepperoni and sauce) only need 1 jar sauce and 8oz of noodles. If you go for the heartier version (all meats and veggies) use 2 jars sauce and 16 oz noodles.