Caprese Salad with White Beans

Ingredients

• 1 bunch of fresh basil
• 1 tsp dijon mustard
• salt, pepper
• 80 ml olive oil (1/4 cup)
• 1 tbsp balsamic vinegar (or sherry vinegar / apple cider vinegar)
• 450 g ripe tomatoes (1 pound)
• 125 g mozzarella cheese (4.5 oz)
• 120 g white beans (4.2 oz), canned or cooked