1 large grapefruit 2 large bunches arugula 1 ripe avocado, pitted and sliced 2 Tbsp fresh lemon juice 2 Tbsp olive oil ½ tsp koser salt ½ tsp ground black pepper 3 – 5 oz salmon fillets (skin on) ¼ toasted walnuts, roughly chopped Peel and segment the grapefruit with a sharp knife, reserv…