Blend the slices of bread in a blender to make bread crumbs. Mix the meat, breadcrumbs, onion, and egg whites in a bowl and form 18 balls.

Spray a frying pan with non-stick cooking spray and fry the meatballs evenly on each side so they are a light brown in colour.

Finish cooking the meatballs until cooked through in the oven (I had it set at 400).

While the meatballs are cooking, in a saucepan combine ketchup, sweetener, vinegar, water, soy sauce and heat on medium until bubbles start to form. Add in the thickener and turn down the heat, continue stirring until sauce thickens

Evenly coat the meatballs in the sauce and enjoy!