Bola-bola (filipino meatballs)

Ingredients

• 650 g extra-lean ground pork
• 1/2 medium onion, finely chopped
• 1 medium carrot, grated
• 1 small sweet potato, grated
• 1 egg
• 1/4 cup plain white flour
• 3 tablespoons soy sauce
• 1 teaspoon sugar