Preheat oven to 350 degrees.

Cut tomatoes in half and scoop out centers into a bowl.

Place hollowed tomatoes on a baking pan and set aside.

Chop tomato centers from the bowl.

Peel and finely dice the onion.

Place a little olive oil in a skillet over medium-high heat and begin to cook pork.

Add diced onion, minced garlic, salt, black pepper, and red pepper flakes to ground pork.

Cook and stir until meat is no longer pink.

Add bell peppers and diced tomato centers and cook for 2 more minutes.

Remove from heat.

Add beaten egg and bread crumbs, mixing well.

Fill tomatoes with skillet contents.

Place tomatoes in the oven for 40-45 minutes until tomatoes are tender.