French Dip Sliders

Bahan-bahan (12 porsi)

• 1 package Hawaiian sweet rolls (12 rolls)
• 1 pound daging sapi panggang deli (atau sisa daging sapi panggang irisan)
• 6 slices keju provolon
• 4 Tablespoons mentega
• 1/4 teaspoon bubuk bawang putih
• 1 Tablespoon dried onion flakes
• 1 package campuran saus au jus