23 individual wellingtons Recipes

shallot, unsalted butter, olive oil, divided, beef tenderloin steaks or 4 (4 1/2 oz) filet mignon, each 1 inch thick, kosher salt, fresh ground black pepper, grainy mustard, grated gruyere cheese, divided, flour , for rolling out pastry, sheet puff pastry, thawed (from a 17.3-oz package), egg, beaten, fleur de sel , maldon salt or other coarse salt

softened butter or 5 tbsp margarine, divided, sliced mushrooms, onion, chopped (about 1/2 cup), beef tenderloin steaks, seasoned with salt and pepper (about 6 oz. each), frozen puff pastry, thawed (2 sheets ), liverwurst spread, egg, water, beef broth, red wine, shallot, finely chopped (about 2 tbsp), dried thyme leaves, all-purpose flour, chopped italian parsley