材料

INGREDIENTS:

• 3 three large portabella mushrooms
• 1 1/2 tablespoons of cooking oil
• 1 1/2 tablespoons of vegan butter
• 3 tablespoons of mushroom soy sauce
• a few dashes of pepper

Garnish:

• fresh greens
• pickles
• garden tomatoes
• burger buns
• vegan mayonnaise