The best tempura lobster with dipping sauce

INGREDIENTS

• 2 x 1.3 kg live lobsters, from
• , ask your fishmonger
• 1 handful okra, left whole
• 4 fresh red chillies, left whole
• edible flowers, such as viola, borage, courgette, optional
• 2 free-range egg yolks
• 350 ml water, iced
• 1 teaspoon cornflour
• 200 g self-raising flour
• 12 tablespoons rice wine vinegar
• 4 tablespoons sugar
• 2 tablespoons low-salt soy sauce
• 2 teaspoons grated fresh ginger