Crab melon salad

Name: Crab & melon salad
Ingredients: 100g picked white crabmeat (see step-by-step to prepare a fresh crab); ½ red chilli, finely chopped; 6 drops of Tabasco; juice 1 lime; 1 tbsp snipped chives; 1 small fennel bulb with fronds; ½ small loaf of rustic wholemeal bread, unsliced; 2 tbsp extra virgin olive oil, plus extra for drizzling; 1 very ripe avocado; large knob of butter; 175g watermelon, cut into small cubes; 175g cantaloupe melon, diced into 1cm cubes; 1 preserved lemon, very finely diced; 1 tbsp lemon juice