Tomato Salad with Cucumbers, Arugula, and Sardines

1 cucumber quartered lengthwise and thinly sliced crosswise

1¼ lb. tomatoes seeded, diced

½ med onion cut thin rings

½ cup chopped fresh Italian parsley

½ cup coarsely chopped arugula

2 tablespoons chopped fresh mint

8 oil-packed sardines drained, diced

1/3 cup extra-virgin olive oil

2 tablespoons fresh lemon juice

Salt to taste

Freshly-ground black pepper to taste

2 teaspoons grated lemon peel

• Combine cucumber, tomatoes, onion, parsley, arugula, mint, and all but 2 pieces sardines in large bowl; toss to combine.