Tomato, Vidalia Onion, And Chickpea Salad

• 475 gr coarsely tomato (chopped)
• 100 gr coarsely vidalia (chopped)
• 22 ml wine vinegar (red)
• 8 gr basil (chopped fresh)
• 5 ml dijon mustard
• 1 gr salt
• 1 gr pepper onion