Individual Beef Wellingtons

Name: Individual Beef Wellingtons
Ingredients: 4 (6-ounce) thickly cut filet mignons; 1 teaspoon salt; 1/2 teaspoon freshly ground black pepper; 1 tablespoon olive oil; 4 (1-ounce) slices goose or duck liver, or pork country-style pate; One-half (17 1/4-ounce package) frozen puff pastry (1 sheet), thawed; Mushroom Duxelles, recipe follows; 1 large egg beaten with 2 teaspoons water to make an egg wash; 1 tablespoon unsalted butter; 2 tablespoons minced shallots; 1/2 teaspoon minced garlic; 10 ounces button mushrooms, wiped clean, stemmed, and finely chopped; 1/4 teaspoon salt; 1/8 teaspoon freshly ground white pepper; 2 1/2 tablespoons dry white wine