Filipino Beef Empanadas with Flaky Sourdough Crust

Name: Filipino Beef Empanadas with Flaky Sourdough Crust
Ingredients: 113 grams sourdough discard; 28 grams water (ice cold); 1 egg (large); 300 grams all-purpose flour; 1 teaspoon salt; ½ teaspoon baking powder; 226 grams unsalted butter (cold and cut into ½-inch cubes); 28 grams canola oil (or another neutral-flavored oil); 226 grams ground beef (80/20); 300 grams Yukon Gold Potato (finely diced); 150 grams carrots (finely diced); 75 grams raisins; 60 grams peas (frozen); 1 teaspoon Watkins Organic Smoked Paprika; 1 teaspoon Watkins Organic Garlic Powder; 1 teaspoon Watkins Organic Whole Black Peppercorns (freshly-ground); 2 teaspoons salt (or more to taste); 1 egg; ⅛ teaspoon salt