2 tablespoons olive oil
8 ounces mushrooms, finely chopped
1 large Vidalia onion, chopped
2 cloves garlic, chopped
Pinch red pepper flakes
1/4 cup chicken stock
1 tablespoon Worcestershire sauce
1 egg, lightly beaten
1/2 cup panko (Japanese) breadcrumbs
6 ounces crumbled blue cheese
2 pounds ground turkey
1 (8-ounce) can tomato sauce
1 shallot, sliced
Kosher salt and freshly ground black pepper