Stir-Fried Cabbage

1 tablespoon vegetable oil

2 tablespoons minced onion

2 cloves garlic, minced

6 cups chopped cabbage

1 tablespoon soy sauce

½ teaspoon white sugar

⅛ teaspoon ground black pepper

Heat vegetable oil in a large skillet over medium heat; cook and stir onion and garlic until tender, about 10 minutes. Cook and stir cabbage into onion mixture until slightly tender, about 5 minutes. Reduce heat to medium-low; add soy sauce, sugar, and black pepper. Cook and stir until cabbage is tender, 3 to 5 more minutes.