Preheat oven to 400°F. Line a small pan with parchment paper, or foil. Spray with cooking spray.
In a skillet, cook onion and garlic in olive oil until tender. Cool completely.
Combine all meatloaf ingredients in a bowl and mix well.
Form into a 3"x8" loaf and place on prepared pan.
Bake 30 minutes uncovered. Top with topping and bake an additional 30-40 minutes or until loaf reaches 160°F.
Rest for 5-10 minutes prior to serving.
Notes
Try this optional keto-style meatloaf glaze! Heat 1 cup of sugar-free balsamic vinegar, 1 tablespoon of low or no sugar tomato paste, and 2 tablespoons of sugar-free maple syrup. Simmer until the glaze is thickened and brush over the meatloaf before the second bake.
Cool meatloaf up to 10 minutes before removing and slicing.