Start by washing the tomatoes and drying . Cut the tomatoes in half length wise. Sprinkle the tomatoes with the half of oregano. Salt and pepper to taste and drizzle with half the olive oil. Then roast in a preheated 375-degree oven for 15 minutes.
Mean while in a bowl mix the breadcrumbs, grated parmesan parsley, garlic, and onion powder
Top the pre roasted tomatoes with the breadcrumb mixture. And re bake for an additional 20 to 30 minutes. top with Italian parsley.