Southern Tuna Salad with Apple

2 Drop the diced apples in a mixture of 1 cup water to 4 tablespoons lemon juice to keep them from turning brown.
3 Drain, pat dry and set aside.
0 Drain the tuna and pat dry with paper towel.
1 Add to a large mixing bowl.
4 Add the apples, celery, pecans, and onion.
5 Stir gently to mix.
6 Whisk the sugar into the mayonnaise (if using).
7 Spoon the mayonnaise mixture over the tuna mixture and stir to coat.
8 Refrigerate or serve immediately.