Prepare the Ingredients: Slice the beef, onion, and bell pepper. Mince the garlic.

Heat Oil: In a large skillet, heat vegetable oil over medium-high heat.

Cook the Beef: Add the sliced beef to the skillet. Cook for about 3-4 minutes until browned but not fully cooked. Remove and set aside.

Sauté Vegetables: In the same skillet, add the onion and bell pepper. Sauté for 3-4 minutes until softened. Add garlic and cook for an additional minute.

Return Beef: Add the beef back into the skillet with the vegetables.

Make the Gravy: In a bowl, mix beef broth, soy sauce, Worcestershire sauce, black pepper, salt, paprika, and garlic powder. Pour this mixture into the skillet.

Simmer: Bring the mixture to a boil. Reduce the heat and let it simmer for about 10 minutes, allowing the flavors to meld.

Thicken Gravy: In a small bowl, combine cornstarch and cold water to make a slurry. Gradually add this to the skillet, stirring constantly until the gravy thickens.

Adjust Seasoning: Taste and adjust seasoning if necessary.

Serve: Serve hot over cooked rice or noodles.