Step 1

In a large skillet (with a lid), combine the brown sugar, vinegar, ketchup, soy sauce and 2 cups of the pineapple juice. Stir the mixture around and bring it to a gentle boil over medium-high heat. To thicken the sauce, make a slurry by mixing the cornstarch with the remaining 1/4 cup pineapple juice in a small bowl until smooth. Add it to the sauce, whisking to combine.

Step 2

Add the frozen meatballs, sriracha and bell pepper and toss to combine. Cover the skillet and cook until the sauce has thickened and the meatballs are heated through, 8 to 10 minutes.

Step 3

Stir in the pineapple, then sprinkle in 2 tablespoons of the green onions. Serve the meatballs and sauce over rice and sprinkle on the rest of the green onions at the end.

Step 4

Combine the beef, breadcrumbs, milk, parsley, cream, mustard, salt, black pepper, red pepper flakes and eggs in a large bowl. Knead it all together with your hands until well combined.

Step 5

Scoop out 1-tablespoon portions of the meat mixture and roll into neat balls. Put them on parchment paper-lined rimmed baking sheets as you go, then put the sheets in the freezer for about 10 minutes to firm them up before frying.

Step 6

To brown the meatballs, heat 1/4 cup olive oil in a large skillet over medium-high heat. Working in batches, add some meatballs to the skillet and cook on all sides until they have great color on the surface and are fully cooked inside, 5 to 6 minutes. Drain the meatballs on paper towels when they're done, then line them up on clean parchment paper-lined baking sheets. Cook the remaining meatballs.

Step 7

Put the baking sheets in the freezer, uncovered, until the meatballs are frozen and firm on the surface, 30 to 45 minutes. Then just pop the meatballs into 5 to 7 freezer bags (roughly 25 per bag) and freeze them immediately. They'll be there when you need them.