Sohui Kim’s Pork-and-Chive Dumplings

2 tbsp. canola oil, plus more for frying dumplings
1 cup diced onion
3 tbsp. minced garlic
2 tbsp. minced ginger
1 cup chopped garlic (or Chinese) chives
1 1/2 lbs. ground pork
1 8-oz. package firm tofu
3 tbsp. hoisin sauce
1 16-oz. package dumpling wrappers (look for the Twin Marquis brand, Hong Kong style, available in many Asian food stores)
1 egg, beaten and reserved in a small bowl
Salt and pepper to taste

In a large pan, heat the canola oil over medium heat. Add onions, garlic, ginger, and garlic chives and cook for 8 minutes. Season with salt and pepper and let cool. In a large bowl, combine pork, tofu, and hoisin sauce with the chive mixture. Test-fry a small portion of the pork mixture and adjust seasoning. (1) Holding dumpling wrapper flour side down, place a teaspoonful of pork mixture onto the middle of the wrapper. (2) Dip your index finger into the beaten egg and rub it over half of the outer edge of the dumpling. (3) Fold dumpling in half, crimping it in the middle and sealing along the egg-moistened edge, taking care not to leave any air pockets. Repeat procedure and pan-fry the dumplings until crisp and brown on both sides. Serve with a combination of soy sauce and rice-wine vinegar to dip. Note: makes about four dozen dumplings; extras will keep in the freezer for two weeks or so.