Grilled Cheese Sandwiches with Sautéed Mushrooms

Ingredients for 4 servings

6 tablespoons unsalted butter
1 tablespoon olive oil
4 medium shallots, thinly sliced (about 3/4 cup)
2 teaspoons light brown sugar
8 ounces mixed mushrooms, such as shiitake and oyster
1 tablespoon fresh thyme leaves
2 tablespoons sherry vinegar
Kosher salt and freshly ground black pepper
12 ounces taleggio cheese, sliced
8 slices hearty bread, such as Pullman loaf

Read the Instructions here