Dijon and Cilantro Tuna Sandwich

Ingredients

1/3 cup reduced-fat mayonnaise

2 tablespoons Dijon mustard

1 tablespoon whole grain mustard

1 garlic glove, minced

1 tablespoon fresh lime juice

6 tablespoons sweet relish

2 (6 ounce) cans solid albacore tuna packed in water, drained

1/2 cup chopped celery

1/2 cup red onion

1/2 cup chopped fresh cilantro

12 slices whole grain bread, toasted

2 medium tomatoes, sliced

arugula leaves or spring mix