Watercress-avocado soup

Ingredients

• 1 cup (250ml) warm water
• 230 g cubed tomatoes
• 1 cup (150g) cubed cucumbers
• 2 tbs shredded leeks
• 1/2 cup (60g) cubed celery
• 3 tbs condensed pistou ((see below))
• 1 pinch sea salt
• 2 cups (48g) cubed avocados ((about 3 avocados))
• 1 cup (30g) shredded watercress
• 1/2 cup (125ml) olive oil
• 1 cup (75g) fresh basil
• 1/2 cup (60g) grossly chopped dried tomatoes
• 1/2 cup (75g) pistachios
• 1 tbs lemon juice
• 1 1/2 tbs sea salt
• 1 1/2 clove garlic