New Years Eve Meat Pie

Name: New Year's Eve Meat Pie
Ingredients: Extra-virgin olive oil (for brushing); 2 lb. boneless beef chuck roast, cut into 1/4 cubes; 3 small Yukon Gold potatoes, peeled, cut into 1/2 cubes; 1 large onion, finely chopped; 1 Tbsp. kosher salt; 2 tsp. freshly ground black pepper; 1 tsp. cumin seeds, lightly crushed; 1 tsp. ground coriander; 2 (14-oz.) packages puff pastry, preferably all-butter; All-purpose flour (for dusting); 1 large egg