Heat a large pan over medium heat and melt the butter.
Add the diced onion, green bell pepper, red bell pepper, and jalapeño. Sauté for about 5 minutes until the vegetables start to soften.
Add the ground beef to the pan and cook until it is fully browned and the vegetables are tender.
Drain any excess grease and return the mixture to the pan.
Stir in the soy sauce, garlic powder, salt, and black pepper. Mix well until everything is evenly combined.
Serve hot with cooked rice if desired. Enjoy!
