Step 1

Cut the bell pepper and onion into equally sized 3/4" squares. Heat the olive oil in a large skillet over medium-high heat and add the veggies. Cook until the peppers have slightly softened and the onion begins to caramelize around the edges, about 3-5 minutes.

Step 2

Transfer the veggies to a bowl and add the ground beef to the skillet. Press it flat and brown both sides before breaking apart with a spatula and fully cooking.

Step 3

While the beef cooks, mix the sauce ingredients together. Once the beef is fully cooked, add the sauce and cook until you have a thick sauce that leaves a clear trail when you drag a spatula across the bottom of the skillet. This should take about 4-6 minutes.

Step 4

Once the sauce has thickened, add the veggies back to the skillet and stir everything together. Garnish with scallions and sesame seeds, if desired.