Roasted Prawns with Morels and Morel Butter

Name: Roasted Prawns with Morels and Morel Butter
Yield: Makes 6 Servings
Ingredients: 8 ounces fresh morel mushrooms or 2 ounces dried morel mushrooms; 8 tablespoons (1 stick) unsalted butter, room temperature, divided; 3/4 cup chopped shallots, divided; 1 garlic clove, minced; 1 1/2 teaspoons chopped fresh thyme; 6 4 1/2- to 5-ounce uncooked giant prawns or 24 large prawns