Mix minced beef and pork in a 1:2 ratio.

Add minced garlic, soy sauce, oyster sauce, sugar, and black pepper to the meat mixture. Mix well and let marinate for 30 minutes.

Prepare vegetables: chop onion, green onion, orange bell pepper, and red bell pepper finely.

Separate the chopped onion from the other vegetables.

Heat 1 tbsp olive oil in a pan and stir-fry the marinated meat until crumbly and cooked through.

Add the onion to the pan and stir-fry until it becomes translucent.

Add the remaining vegetables and stir-fry until they are cooked through.

Turn off the heat and finish with sesame oil and sesame seeds.