Korean Beef Lettuce Wraps

1 pound lean ground beef (or turkey, or chicken)
3 cloves garlic, minced

1 Tbls sesame oil (I've used coconut and olive oil as well)

1/4-1/2 cup brown sugar
1/4 cup low-sodium soy sauce
1/2 tsp ginger, minced (although sometimes I just use ground ginger)
1/4 tsp red pepper flakes
One bunch green onions, chopped
1 1/2 cup cooked rice
Iceberg lettuce leaves, separated, washed, dried

Heat a large skillet over medium heat and brown ground beef with garlic in the sesame oil. Drain the fat, then add brown sugar, soy sauce, ginger, and red pepper flakes. Simmer for a few minutes to blend the flavors and thicken the sauce. Top with green peppers and serve, on top of rice, in the lettuce leaf cups.