Beef tomato carpaccio with spring onion and ginger salsa

Name: Beef tomato carpaccio with spring onion and ginger salsa
Cuisine: European, Italian, Mediterranean
Ingredients: 3cm piece ginger peeled and roughly chopped; flaked sea salt; 3 spring onions very finely sliced; 40ml sunflower oil or other mild oil; 2tsp good-quality sherry vinegar; 400g beef tomatoes about 2, depending on size, sliced 2 mm thick; 0.25 green chilli deseeded and finely chopped; 1.5tbsp coriander finely shredded; 1tbsp olive oil