Sumac and sesame grilled blue eye with fattoush

Name: Sumac and sesame grilled blue-eye with fattoush
Ingredients: 1 tablespoon sesame seeds; 2 teaspoon dried chilli flakes; 1 tablespoon sumac; 2 teaspoon sea salt flakes; 4 x 180g skinless blue trevalla fillets; 1 medium lemon (140g), cut into wedges; 2 large pita breads, (160g); 4 small tomatoes (360g), chopped coarsely; 1 large green capsicum (350g), chopped coarsely; 4 red radishes (140g), sliced thinly; 2 lebanese cucumber, chopped coarsley; 4 green onions, sliced thinly; 1 1/2 cup firmly packed fresh parsley leaves, torn; 1/2 cup fresh mint leaves, torn; 1 tablespoon extra virgin olive oil; 1/4 cup (60ml) lemon juice; 2 clove garlic, crushed