Combine all ingredients in a large freezer bag and squish to combine.
Remove excess air, seal, and freeze.
Thaw overnight in the fridge.
Empty the contents of the bag into your skillet.
Add 2 Tbsp. cornstarch and whisk into meal.
Bring to a boil over medium-high, stirring constantly.
Reduce to a simmer and cook for 10 minutes, stirring occasionally, until thickened.
Serve over rice and sprinkle with sliced green onions.