In a large skillet over medium-high heat, combine the ground beef and Italian sausage. Cook for about 5-7 minutes, stirring frequently, until browned.

Return the skillet to medium heat and add the chopped onions. Sauté for about 3-4 minutes until the onions are translucent.

Stir in the pizza sauce and the softened cream cheese, mixing thoroughly for 2-3 minutes until smooth.

Fold in the shredded cheddar cheese until it melts and combines into the filling.

Prepare the green bell peppers by slicing them in half lengthwise and removing the seeds.

Generously fill each bell pepper half with the creamy meat mixture and place them upright in a baking dish.

Sprinkle the stuffed peppers with shredded mozzarella cheese and layer on the sliced pepperoni and olives.

Cover the baking dish with foil and bake in a preheated oven at 350°F for 20 minutes.

Remove the foil and bake uncovered for an additional 10-20 minutes until the cheese is bubbly and golden.

Allow the peppers to cool for a few minutes before serving.