Seared Tuna With Sage - With greens

3 tablespoons extra-virgin olive oil 3 large garlic cloves , thinly sliced 1/2 cup red onion , thinly sliced 1 1/4-1 1/2 lbs albacore tuna , cut into 1-inch[...]

1 1/2 lbs tuna steaks , about 6 oz each 2 tablespoons olive oil 8 ounces fresh arugula (or more) 4 tablespoons soy sauce 3 tablespoons orange juice 1[...]

1 1/2 lbs center-cut fresh ahi tuna or inch thick sushi quality tuna steak 1 teaspoon kosher salt 2 teaspoons black peppercorns 1 teaspoon white peppercorns 2[...]