Cook the Filling:
Heat 1 tablespoon of oil in a large skillet or wok over medium heat. Add ground pork, garlic, and ginger. Cook until meat is browned and fully cooked through, about 5–6 minutes.
Add Vegetables:
Stir in shredded cabbage, carrots, bean sprouts, and green onions. Sauté for 3–4 minutes until softened but still crisp.
Season It:
Add soy sauce, oyster sauce, sesame oil, salt, and pepper. Stir to coat evenly. Remove from heat and let the filling cool slightly (important so it doesn’t tear the wrappers).
Assemble the Egg Rolls:
Place a wrapper on a flat surface with one corner facing you (diamond shape). Spoon about 2 tablespoons of filling into the center. Fold the bottom corner over the filling, then fold in both sides, and roll tightly. Brush the top corner with beaten egg to seal.
Fry the Egg Rolls:
Heat oil in a deep skillet or heavy pot to 350°F (175°C). Fry 3–4 egg rolls at a time for 3–4 minutes each, turning occasionally, until golden brown and crispy. Drain on paper towels.
Serve:
Enjoy hot with your dipping sauce of choice — sweet chili, soy-ginger, or spicy mustard.