Preheat oven to 180°C (fan forced). Grease a 9cm deep, 9cm x 19cm loaf pan. Heat oil in a medium frying pan over medium heat. Add onion and garlic. Cook, stirring, for 5 minutes or until the onion has softened. Set aside for 5 minutes to cool
Place onion, breadcrumbs, minces, egg, mustard, worcestershire sauce and ½ cup tomato sauce in a bowl. Mix to combine. Spoon into pan. Level top with a spoon
Spread barbecue sauce over top of mince. Bake for 1 hour or until meatloaf has browned and comes away from the sides of the pan. Rest for 5 minutes.
Notes
Leftovers are ideal for sandwiches if your teenage son doesn't consume them first.