Mushroom and Grape Crostini

Name: Mushroom and Grape Crostini
Ingredients: 1/2 baguette, cut into twenty-four 1/4-inch slices; 1/4 cup extra-virgin olive oil; 1/2 teaspoon salt; 1/2 cup mascarpone cheese, chilled; 1 tablespoon chopped chives; 1/4 teaspoon kosher salt; 1/2 pound assorted mushrooms, torn and cut into bite sized pieces; 1 cup red grapes, halved; 5 sprigs fresh thyme, leaves removed and stems discarded; 2 shallots, sliced into rounds; 3 tablespoons extra-virgin olive oil; 1 teaspoon sherry vinegar; 24 shavings of Parmesan