Butter, to grease pan
12 ounces fusilli pasta (or shells or wide egg noodles -- whatever you like)
2 tablespoons olive oil
2 cups sliced cremini mushrooms
1/3 cup minced shallots (about 2 large shallots)
4 cloves garlic, minced
1/2 cup dry white wine
3 tablespoons all-purpose flour
3 1/2 cups whole milk
3/4 cup grated Parmesan cheese
3 tablespoons capers, drained
2 5-ounce cans chunk light tuna, drained
1/2 cup sour cream
1 cup thinly-sliced kale or spinach
1 1/2 teaspoons dried thyme
1 teaspoon kosher salt
1/8 teaspoon freshly ground black pepper
2 tablespoons unsalted butter
1/2 cup bread crumbs
1/2 cup finely chopped Italian parsley, to top (optional)