Preheat oven to 350°F and grease a rimmed cookie sheet with nonstick spray.
In a large bowl mix together the meatball ingredients.
Form the ground beef mixture into 1-inch round balls and place them on the prepared baking sheet and bake for 30 minutes.
Whisk the cornstarch and sugar together in a medium saucepan.
Add the soy sauce, vinegar, and the juice from the can of pineapple to a measuring cup and top off with enough water to make 1 cup, if needed.
Heat on medium heat, stirring regularly until the sauce thickens.
Add the meatballs, crushed pineapple, and yellow peppers and continue cooking until everything is hot, about 2 minutes more.
Serve over hot cooked rice and garnish with fresh chopped parsley or enjoy over quinoa, on a salad, in a sub roll, sliced on pizza, or as an appetizer!