INGREDIENTS
1 tbsp
unsalted butter
1 tsp
olive oil
3 cups
sliced crimini mushrooms
1 tbsp
fresh thyme leaves, plus more for garnish
2 cups
shredded mozzarella
1 cup
shredded swiss cheese
1/4 cup
mayonnaise
1/2 tsp
granulated garlic
1/4 tsp
black pepper
1/2
loaf french bread (1 whole loaf cut lengthwise)