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INGREDIENTS
Mushroom Mixture
8 ounces mushrooms
1 clove garlic
½ teaspoon salt
½ teaspoon black pepper
Thyme

2 6-ounce beef tenderloins
2 tablespoons oil, for searing
English mustard
¼ pound sliced ham
1 sheet puff pastry, thawed, rolled-out, and cut into 2 7x7-in squares
Egg wash (1 egg beaten with 1 tablespoon water)

PREPARATION
In a food processor, place mushrooms, garlic, salt, pepper, and thyme and blend into a fine paste (about 30-60 seconds).
Transfer to a medium-sized frying pan, being sure to spread it evenly across the bottom of the pan.
Cook the mushrooms over medium-low heat while stirring frequently. After about 7-10 minutes the mushroom mixture should shrink to half the original volume and begin to form a paste. At this point, remove the mushroom mixture from the heat and set it aside. (NOTE: The goal here is to cook off the bulk of the water inside the mushrooms. This?ll keep the puff pastry from being too mushy at the end.) Preheat oven to 400?F/200?C.
Liberally season the outside of the tenderloin pieces with salt and pepper. In another medium-sized frying pan, heat 2 tablespoons of neutral oil over high heat. Once the oil has begun to smoke, quickly sear the tenderloin pieces on both sides (45-60 seconds per-side). Once seared, transfer the meat to a plate or cutting board to rest.
Using a basting brush, generously paint the mustard over the resting pieces of beef, making sure to coa...