Line a baking sheet with aluminum foil.
Wash and slice bell pepper in half, clean out seeds.
Place pepper on baking sheet. Spread 2 tbsp of marinara (1 tbsp/half) in bottom of each pepper. Fill pepper with 2/3 cup of pizza topping (1/3 in each half).
Place in oven and bake at 400 degrees for 20 minutes.
Remove pepper from oven and sprinkle 2 tbsp of cheese (1 tbsp/half) on top of peppers.
Place back in oven and bake for 5 more minutes, till cheese is melted.