For the garlic mushrooms
01 -
8 oz (225 g) cremini mushrooms, sliced
02 -
1 tablespoon olive oil
03 -
1 tablespoon unsalted butter
04 -
2 large garlic cloves, minced
05 -
1 teaspoon fresh thyme leaves, or 1/4 teaspoon dried thyme
06 -
1/4 teaspoon fine salt, plus more to taste
07 -
1/8 teaspoon black pepper
08 -
1 teaspoon fresh lemon juice
For the sandwiches
09 -
4 slices sourdough bread
10 -
2 teaspoons Dijon mustard
11 -
3 oz (85 g) Gruyere cheese, shredded
12 -
3 oz (85 g) fontina cheese, shredded
13 -
2 tablespoons unsalted butter, softened, for the bread