Empanadas Salteñas

Name: Empanadas Salteñas
Ingredients: 6 tablespoons water; 0.5 teaspoon salt; 2 cups all-purpose flour, sifted; 0.25 cup margarine, melted; 1 teaspoon vegetable oil, or as needed; 2 medium potatoes, peeled and cubed; 0.25 cup salted butter; 2 medium onions, chopped; 2 stalks green onions, finely chopped; 1.5 medium red bell peppers, seeded and chopped; 0.66666668653488 pound ground beef; 1 teaspoon salt; 0.5 teaspoon cayenne pepper; 1 teaspoon ground cumin; 1 teaspoon paprika; 3 large hard-boiled eggs, peeled and chopped