Pork and Vegetable Lumpia from 'The Adobo Road Cookbook'

INGREDIENTS

• 2 tablespoons high-heat cooking oil, plus more for frying
• 1 small onion, diced
• 4 cloves garlic, minced
• 1 pound (500 g) ground pork
• 1 tablespoon fish sauce
• 1/2 teaspoon freshly ground black pepper
• 1 cup (70 g) grated carrot
• 1 cup (70 g) mung bean sprouts
• 1/2 cup (65 g) frozen peas
• 25 square spring roll wrappers (8 x 8 in/20 x 20 cm), thawed
• Water, for sealing the spring rolls
• , for serving