Pelmeni

Ingredients

• 3 cups unbleached all-purpose flour
• 1 teaspoon salt
• 1 large egg
• 3/4 cup very cold water, plus up to 1/4 more, if needed
• 1/2 pound ground beef (you want to use fattier ground beef her, not leaner)
• 1/2 pound ground pork
• 2 medium-size onions, finely chopped (or pureed in the food processor, read on)
• 1/4 cup crushed ice, or very cold ice water
• 2 tablespoons salt
• freshly ground pepper to taste