Salmon and Avocado Terrine

Name: Salmon and Avocado Terrine
Ingredients: 1 1/4 pounds salmon fillet, cut into 1/2-inch cubes; 1 teaspoon salt; 1 teaspoon freshly ground black pepper; 3 cups fish stock or clam juice; 1 tablespoon unsalted butter; 3 shallots, thinly sliced; 1/2 cup thinly sliced mushrooms; 1 cup brandy; 2 tablespoons unflavored gelatin; 2 dashes of Tabasco; 1 1/2 cups cold heavy cream; 4 ounces thinly sliced smoked salmon, cut into 5 by 1 1/2inch strips across the grain; 1 ripe avocado, peeled, pitted, and thinly sliced