01 - Heat 1 tbsp vegetable oil in a large skillet or wok over medium-high heat. Add minced garlic and grated ginger, sauté for 30 seconds until fragrant.
02 - Add shredded cabbage, carrots, sliced mushrooms, and bell pepper to the hot pan. Stir-fry for 2-3 minutes until vegetables begin to soften slightly.
03 - Add bean sprouts and sliced green onions. Continue stir-frying for another minute to maintain crunch.
04 - Stir in soy sauce, oyster sauce, sesame oil, and white pepper. Cook for 1-2 minutes until vegetables are tender-crisp. Transfer filling to a colander, cool completely, and press gently to remove excess moisture.
05 - Place a wrapper with a corner facing you. Add about 2 tbsp filling near the bottom corner. Fold the corner over filling, fold in sides, and roll tightly. Seal edge with flour-water paste. Repeat with remaining wrappers.
06 - Heat 2 inches vegetable oil to 350°F in a deep skillet or pot. Fry spring rolls in batches for 3-4 minutes, turning occasionally, until golden brown and crispy.
07 - Remove spring rolls with a slotted spoon and drain on paper towels. Serve immediately with sweet chili sauce or soy sauce for dipping.