Preheat oven to 400 degrees. Grease a 9x13 pan or a loaf pan and set aside.
In a large pan over medium-low heat, saute the onions, garlic, celery, red pepper, salt, pepper and thyme in oil until soft and translucent, about 10-20 minutes. Stir occasionally so the mixture doesn't burn. Set aside to cool.
Combine the vegetable mixture with the ground turkey, egg and crumbs. Mix to combine.
Place the mixture in the prepared pan and pour the barbecue sauce over it.
Bake at 400 degrees for 30-40 minutes for a flatter pan like a 9x13, and about an hour for a loaf pan.
Remove from oven and serve immediately.
Recipe by Overtime Cook at https://overtimecook.com/2014/04/07/turkey-veggie-meatloaf/