Salad Tomat Ceri

Bahan-bahan (4 porsi)

• 750 g / 1.5lb cherry tomatoes or grape tomatoes ((or large tomatoes))
• 1/2 red onion (, finely sliced)
• 1/2 cup basil leaves (, tightly packed, finely sliced (Note 2))
• 1 tbsp cider vinegar ((Note 3 for others))
• 2.5 tbsp extra virgin olive oil
• 1/2 tsp dijon mustard ((or other non spicy mustard))
• 1/2 tsp each salt and pepper