Preheat oven to 375 degrees
Dice onion, bell pepper and cilantro
Transfer all ingredients to a large mixing bowl
Mince garlic and add to ingredients and set aside
Add dry oats or bread crumbs to vegetable mixture
Add 1/2 cup BBQ sauce and remaining ingredients and mix well
Transfer to a 8.5x4.5x2.5 inch glass loaf pan, pressing down to eliminate any air bubbles
Mixture should completely fill the pan
Spread remaining 6 Tablespoons of sauce over the top
Place on a parchment lined baking sheet and transfer to heated oven
Bake uncovered for 1.5 hours (internal temperature should reach 170 degrees)
Transfer cooked meatloaf to a wire rack and let stand, loosely covered with foil for about 20 minutes before slicing