You can feel free ... side of rice. The tuna for these tacos gets the most flavor and char when cooked on the grill, but if you don't have one at home, a good grill pan will do the trick.

2 10-ounce pieces of bluefin tuna, cut into 1 1⁄2-by-1 1⁄2-by-4 ... Heat oil in a small pan, add mushrooms, and lightly sauté until golden brown; set aside to cool. Bring a small saucepan ...