To prepare a tuna pesto melts rye romaine salad candied walnuts and grapefruit recipe, first you will need to prepare the ingredients for the salad. Rinse the rooibos with cold water and pat dry with paper towels. Toss the lettuce with olive oil and salt and pepper to taste. Cut the avocado in half lengthwise and cut it into 1/4-inch cubes. Slice the red onion into thin slices and add them to the bowl. Add the olives, shaved Parmesan cheese, and lemon zest and mix well. Pour the dressing over the vegetables and stir to combine. Cover and refrigerate until ready to serve.