Tuna and Avocado Salad with Fermented Onions (Cutter)

Name: Tuna and Avocado Salad with Fermented Onions (Cutter)
Prep time: 15 min
Cook time: 72 h 30 min
Total time: 72 h 30 min
Yield: 4 portions
Ingredients: 300 g red onions; 10 g fine sea salt; 500 g water; 1 cucumber; 250 g tuna, tinned, in oil; 3 Tbsp white wine vinegar; 3 Tbsp olive oil; 1 avocado; 3 sprigs fresh basil leaves; 3 sprigs fresh mint leaves; 3 Tbsp watercress; 2 Tbsp sunflower seeds; ½ tsp fine sea salt; ½ tsp ground black pepper