Tuna Salad 2 cans Tuna in olive oil, do not drain1/4 cup Mayonnaise2 tbsp Red onion, finely chopped2 tbsp Dill, chopped2 tbsp Parsley, chopped1 Lemon, zest, and juiced2 Celery stalks, chopped1 tbsp Ground Mustard Mix together. Chill and serve. Delicious as a Tuna Melt with cheddar cheese on English muffin.