Add the sliced onions, olive oil and sugar to a skillet and saute over high heat for about 3-4 minutes. Reduce heat to medium low and let the onions continue cooking and caramelizing, stirring often, for about 30 minutes. Once caramelized, chop half of the onions to use in the meatloaf.
Preheat oven to 350.
In a large mixing bowl, combine the ground beef, bread crumbs (use GF bread crumbs or GF bread to make this a GF meatloaf!), BBQ sauce, garlic powder, salt and pepper. (I did not include an egg because of an allergy, but you could add 1 egg to the mixture if you prefer. The egg acts as a binder and holds the meatloaf together.) Form into a loaf and add to a 9x5 loaf pan, drizzle a little BBQ sauce on top and then cover with foil.
Bake in the preheated oven for 30 minutes, covered in foil. Then remove the foil and cook for another 30 minutes, or until the meat has cooked through.
Meanwhile, prepare the toast, rolls, rice (whatever!) and veggies.
Serve Caramelized Onion and Barbecue Meatloaf with preferred sides.