Main Ingredients:

• 1 lb beef (sirloin, flank steak, or ground beef), thinly sliced
• 1 tbsp vegetable oil
• 1 red bell pepper, sliced
• 1 green bell pepper, sliced
• 2 cloves garlic, minced
• 1 small onion, thinly sliced
• 2 cups cooked white or brown rice
• 1 tbsp sesame seeds (for garnish)
• 2 green onions, sliced (for garnish)

For the Sauce:

• ¼ cup soy sauce
• 1 tbsp oyster sauce
• 1 tbsp hoisin sauce
• 1 tbsp rice vinegar
• 1 tbsp brown sugar
• ½ tsp ground black pepper
• ½ tsp red pepper flakes (optional for heat)
• 1 tsp sesame oil
• 1 tsp cornstarch (optional for thickening)