Preheat oven to 425 degrees F.
Heat a small skillet over medium heat with 2 tablespoons extra-virgin olive oil. When the oil is hot, saute the red pepper, half the onions, celery and carrots together, 5 minutes, season with salt and pepper then remove to a plate to cool.
Mix ground beef and sausages with egg, bread crumbs, cheese, and cooled vegetables. Form 4 large oval shaped patties no more than 1 1/4 inches thick then drizzle with extra-virgin olive oil. Place in the oven on a cookie sheet and bake 17 to 18 minutes, until cooked through.
Heat a medium sauce pot over medium high heat. Add a drizzle of EVOO to the pan and the pancetta. Let the pancetta crisp up a bit and render fat, then add onions and garlic and cook until tender, 8 to 10 minutes. Add a splash of red wine to deglaze the pan. Stir in the beef stock and tomatoes and season sauce heavily with coarse black pepper. Add Worcestershire and hot sauce and reduce heat to warm.
Serve meatloaves with Italian barbecue sauce on top and green salad alongside.