Mushroom Ragù on Gruyère Toast

Name: Mushroom Ragù on Gruyère Toast
Ingredients: 8 slices baguette; 8 thin slices Gruyère cheese; 1 tablespoon Each: butter and olive oil; 1/4 teaspoon crushed red pepper; 24 ounces mixed mushrooms, your choice; 2 shallots, sliced; 2 cloves garlic, minced; 2 tablespoons mixed fresh herbs (tarragon, thyme, marjoram, parsley, etc.) Plus extra for garnish; 1/2 cup Each: chicken broth and white wine; 1/4 teaspoon Each: kosher salt and fresh ground black pepper; 1/2 cup Parmesan cheese, grated, for garnish (optional)