Spanish onion, sprout, tomato and lettuce salad – Gourmet Traveller

Ingredients

• 1 Spanish onion, thinly sliced
• 1 tbsp raw sugar
• 4 vine-ripened tomatoes, cut into wedges
• 60 ml brown rice vinegar (see note) (¼ cup)
• 2 tbsp shoyu or soy sauce (see note)
• 1 cup sprouts (such as sunflower, broccoli or mung bean)
• ½ iceberg lettuce, coarsely torn
• 80 ml extra-virgin olive oil (1/3 cup)