Penggeser Burger Keju

Bahan-bahan (12 porsi)

• 2 pounds daging giling tanpa lemak
• 1 tablespoon olive oil
• 1 diced small onion
• 1 teaspoon garam
• ¼ teaspoon merica
• ½ teaspoon bawang putih
• ¼ cup saus steak
• 12 dinner rolls, (or Hawaiian slider rolls)
• 13 slices keju Amerika
• 3 tablespoons minyak yg dicairkan
• 1 tablespoon biji wijen