Crispy Beef Empanadas

Name: Crispy Beef Empanadas
Ingredients: 3 cups all-purpose flour; ¾ cup cubed cold unsalted butter; 1 teaspoon salt; 1 large egg; ½ cup milk; 2 tablespoons olive oil; 1 small yellow onion; ⅓ cup finely diced jalapeno (about 1 medium jalapeno); 1 pound ground beef; 2 tablespoons tomato paste; 1 teaspoon chili powder; 1 teaspoon paprika; 1 teaspoon cumin; ½ teaspoon oregano; salt and pepper to taste; 1 cup beef broth; 1 medium potato small diced; ¼ cup frozen peas; 1 egg; 2 tablespoons water