Add tuna salad picture + additional optional ingrendients (#396)

* Add tuna salad pic

* Add tuna salad pic, additional optional ingredients.

src/tuna-salad.md

@@ -1,5 +1,7 @@
 # Simple Tuna Salad
 
+![Tuna Salad](pix/tuna-salad.webp)
+
 - ⏲️ Prep time: 5 min
 - 🍽️ Servings: 3
 
@@ -9,14 +11,18 @@
 - 6 tablespoons mayonnaise 
 - 1 tablespoons sweet pickle relish
 - A pinch of garlic powder (optional)
+- 2 tablespoons white vinegar or lemon juice (optional)
+- 1 cup shredded cheese (optional)
+- 1 chopped hard-boiled egg (optional)
 
 ## Directions
 
 1. In a medium bowl, stir together tuna, mayonnaise, and relish.
-2. Season with garlic powder, salt, and pepper if wanted.
+2. Add optional ingredients like vinegar, cheese or hard-boiled eggs if wanted.
+3. Season with garlic powder, salt, and pepper if wanted.
 
 ## Contribution
 
-scary90
+scary90, TTWNO
 
 ;tags: quick basic tuna fish