Tuna, Arugula and Feta Sandwich and Salad

From Self magazine.

• Ready In: 10 mins
• Serves: 4

Ingredients

• 1⁄4 cup olive oil
• 4  teaspoons  balsamic vinegar
• 4 (3 ounce) cans light chunk tuna in water (drained)
• 4  ounces feta, crumbled
• 20  small black olives, chopped
• 16  cups arugula
• 4  medium tomatoes, sliced
• 8  slices  whole grain bread (thick slices)

Directions

1. Combine oil and vinegar.
2. Mix tuna in a bowl with 4 tsp dressing, feta and olives.
3. Layer 1 cup arugular, 2 slices of the tomato and tuna mixture on each of 4 slices of bread.
4. In a bowl, toss 12 cups arugula with remaining tomatoes and dressing. Serve with sandwich.