Spicy Beef Pie for a Party

Name: Spicy Beef Pie for a Party
Ingredients: For the Pastry Dough; • 2 sticks cold unsalted butter, diced; • 2 ½ cups all purpose flour, plus more for rolling; • 1 extra large egg yolk; • 4 tablespoons cold sour cream; • 1 extra large egg + 2 teaspoons of water, for egg wash; For the Spicy Beef; • 2 large white onions, finely chopped; • 1 tablespoon olive oil; • 6 cloves garlic, minced; • 2 tablespoons fresh ginger, peeled and minced; • 1 tablespoon ground coriander; • 2 teaspoons cumin seeds; • 2 teaspoons turmeric; • Coarse salt and freshly ground pepper; • 2 pounds Organic ground beef chuck, 80/20% lean; • 1 15 oz can diced Fire Roasted Tomatoes; • 2 large eggs, lightly beaten; • 1 cup beef or chicken stock + 2 teaspoons gelatin, for aspic ( optional)