Heat the olive oil in a large skillet over medium-high heat. Saute the green peppers, red peppers and onions until very soft and browned, 10 to 12 minutes. Transfer to a plate or baking sheet and refrigerate until cold. (This can be done a day ahead.)
Preheat the oven to 350 degrees F.
Mix the breadcrumbs, milk and roasted garlic in a bowl; it should have an oatmeal-like consistency. Set aside.
In another bowl, mix the ketchup, steak sauce, sriracha, maple syrup and steak seasoning. If the sauce is too spicy for you, add a little more ketchup to mellow the heat. Set aside.
In a bowl, combine the ground beef, sausage, parsley, eggs, pepper-onion mixture and two-thirds of the meatloaf sauce. Mix well, but don't overwork. Take a small ball of the mixture and make a bite-size patty. Saute the patty in a pan until cooked through, then taste. Add salt and pepper to the meatloaf mix as needed.
When you are happy with the flavor, place the meatloaf mixture in a greased loaf pan, or form it into a log and place it on a parchment-lined baking sheet. Bake until the internal temperature reaches 155 degrees F, 1 to 1 1/2 hours. Remove from the oven; adjust the oven to a low broil. Brush the top of the loaf with half of the remaining sauce, then return to the oven to caramelize the sauce, 2 to 3 minutes. Let rest for 20 minutes before slicing. Serve with mashed potatoes and a drizzle of the remaining sauce.
The leftovers make an amazing sandwich! I add seared slices to a grilled cheese sandwich with some of the sweet and spicy sauce.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe courtesy of Vincentown Diner, Vincentown, NJ