Pecan Crusted Trout

Name: Pecan Crusted Trout
Ingredients: 1 cup lightly toasted pecans, chopped; 1 1/2 cups bread crumbs; 4 tablespoons chopped parsley leaves; 2 teaspoons kosher salt; 1 teaspoon fresh ground black pepper; 1 tablespoon chopped rosemary leaves; 4 trout fillets; 4 ounces unsalted butter, room temperature; Horseradish Cream, recipe follows; 1 head watercress lettuce, bottoms removed; 1/2 apple, cored and sliced into 1/2 moons; 1/4 pound fresh horseradish root, peeled, coarsely grated; 4 tablespoons cider vinegar; 2 tablespoons lemon juice; 1 tablespoon minced shallots; 1/2 teaspoon ground fennel seed; 1 tablespoon salt; 1/4 tablespoon fresh ground black pepper; 4 tablespoons apple cider; 4 tablespoons olive oil; 2 teaspoons toasted walnut oil; 1 cup reduced heavy cream, 3 cups reduced to 1 cup; 3 tablespoons jarred horseradish, strained; 2 tablespoons sour cream; 3 lemons, zested; 1 tablespoon lemon juice