Spicy Crab and Vermicelli

Name: Spicy Crab and Vermicelli
Ingredients: 1 pound vermicelli; Salt; 2 tablespoons extra-virgin olive oil, 2 turns of the pan; 1 tablespoon butter, cut into small bits; 1/2 to 1 teaspoon crushed red pepper flakes, eyeball it, medium to spicy heat level; 2 cloves garlic, chopped; 2 shallots, thinly sliced; 1/2 pound shiitake mushrooms, stemmed and thinly sliced; 1/4 cup dry sherry or Marsala; 8 ounces, drained weight, lump crabmeat, shredded; 1 (28-ounce) can crushed San Marzano tomatoes; 1/4 cup half-and-half or cream, eyeball it; Shredded Romano or Parmigiano, your pick, optional; 10 to 12 basil leaves, shredded