Green gazpacho with burrata and prosciutto

Name: Green gazpacho with burrata and prosciutto
Ingredients: 100g yellow tomatoes; 1 cucumber deseeded and cut into chunks; 3 spring onions chopped; 1 jalapeño deseeded and roughly chopped; 1 small green pepper deseeded and quartered; 2 sticks celery roughly chopped; 1 clove garlic peeled; a small bunch coriander; 2 tbsp sherry vinegar; 3 tbsp (ideally use a peppery green oil) extra-virgin olive oil; 500ml vegetable stock cold; 50g baby watercress saving a few leaves to garnish; 2 tsp sea salt flakes; 6 slices prosciutto; 2 burratas broken into large chunks