In a hot saute pan, heat 1/2 ounce olive oil. Place the mushroom caps top side down in the hot pan. Sear until slightly crisp, turn and sear briefly. Remove from the heat and set aside.
Preheat oven to 400 degrees.
To assemble: Open butterflied tuna, place on the bottom flap in this order: 1 ounce goats' cheese, 1/4 ounce sundried tomato strips, 2 large shiitake mushrooms and 2 basil leaves. Brush the inside flap with the garlic oil. Close and grind black pepper on both sides. Set aside.
Heat a heavy gauge, oven-proof saute pan large enough to hold the four tuna steaks. When hot, add 1 ounce olive oil. Carefully place the stuffed tuna in the pan. Sear until brown. Turning over may be tricky. Try picking up the tuna with a spatula under the tuna and replace in the pan. Place in oven; bake 5 to 10 minutes or until done. Place on hot plates or platter and keep warm.
Source: Source: "Virginia Waterfront Cusine" Virginia Marine Products Board