Step 1

Preheat oven to 350 degrees F. Coat a rimmed baking sheet with cooking spray.

Step 2

In a large bowl, combine beef, onion, crackers, egg, water, onion powder, salt, and black pepper; mix well. Form mixture into 1-inch balls and place on baking sheet.

Step 3

Bake 15 to 20 minutes, or until no longer pink in center.

Step 4

Meanwhile, in a medium saucepan over medium heat, combine brown sugar, cornstarch, vinegar, soy sauce, and reserved pineapple juice. Cook until mixture starts to thicken. Add pineapple and bell pepper and continue to cook 5 to 7 minutes, or until thickened and heated through.

Step 5

Place meatballs in a large bowl. Pour sauce over and toss until evenly coated.