Burger Swiss Jamur

Bahan-bahan (4 porsi)

• ½ cup mentega
• 1 pound baby bella mushrooms, (thick sliced)
• ½ shallot, (minced)
• 1 tablespoon saus Worcestershire
• 2 cloves garlic, (minced)
• garam dan merica secukupnya
• 1 ½ pounds daging giling
• garam dan merica secukupnya
• 4 slices keju Swiss
• 4 roti hamburger
• mentega (untuk memanggang roti)
• mayones