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Ingredients

1. 1/4 cup extra-virgin olive oil, plus more for brushing
2. 2 tablespoons red wine vinegar
3. Salt and freshly ground pepper
4. 2 1/2 pounds tomatoes, cut into 1/2-inch dice
5. 2 scallions, thinly sliced
6. 1 large cucumber—peeled, seeded and sliced crosswise 1/4 inch thick
7. 1 small red onion, thinly sliced
8. 1 cup torn basil leaves
9. 1 1/2 tablespoons Dijon mustard
10. 1 1/2 tablespoons balsamic vinegar
11. 1 tablespoon hot water
12. Four 6-ounce tuna steaks
13. 2 teaspoons dried oregano

Directions

1. Light a grill. In a large bowl, whisk the olive oil with the red wine vinegar and season with salt and pepper. Add the tomatoes, scallions, cucumber, red onion and basil and toss to coat. Refrigerate the salad.
2. In a small bowl, whisk the mustard with the balsamic vinegar and blend in the hot water. Season with salt and pepper.
3. Brush the tuna steaks with olive oil and season with salt, pepper and the oregano. Grill the tuna over a hot fire until lightly charred on the outside and rare inside, about 2 minutes per side. Transfer to a carving board.
4. Mound the tomato salad on plates. Thickly slice the tuna steaks and transfer to the plates. Drizzle the tuna with the balsamic dressing and serve.

Make Ahead

The tomato salad can be refrigerated for up to 2 hours.

Notes

One Serving: 404 calories, 17 g total fat, 2.6 g saturated fat, 20 g carb, 5 g fiber