Cheeseburger Steam Buns

Ingredients (14)

• Bun Dough:
• 2¼ teaspoons active dry yeast
• 1 cup warm water
• 4 1/2 cups flour
• 1/4 cup sugar
• 1/2 cup hot water
• 2 tablespoons vegetable oil
• Burger Filling:
• 1 pound ground beef
• 2 large onions, diced
• 2 tablespoons unsalted butter
• 5 slices Cheddar or American cheese, quartered
• Ketchup, for serving
• Salt, for seasoning