Blend oats until turned into a fine flour.
Mince garlic and mix together the meat, egg, oatmeal flour, and garlic.
Combine all meatball ingredients thoroughly by hand or using a Danish dough whisk.
Roll into evenly sized balls; I made 35.
Heat fat in a large skillet.
Carefully place meatballs into heated skillet, browning each side. Work in batches if necessary.
Drain pineapple juice from can into a bowl. Add remaining sauce ingredients and whisk. Save pineapple chunks for later.
Pour sauce onto browned meatballs on medium heat, cooking all sides by turning them with a large spoon, careful not to overcook.
Add pineapple on top and place lid on skillet for 5 more minutes to finish.
Serve over rice or noodles and top with sesame seeds.