Rinse and dry the tomatoes and dice in small cubes. Place in medium bowl.
Rinse and dry the cannelini beans and add to the diced tomatoes.
Drain the tuna and add to the bowl.
Add remaining ingredients and toss gently.
Serve over mixed greens as a large salad or spoon over baguette small slices, briefly toasted in oven, as an appetizer. (see photo below)