In a small bowl, mix the tuna, mayo, mustard, lime juice, chives, and salt & pepper until combined. Give it a taste and adjust the ingredients as needed.
Spoon the tuna mixture equally into each avocado half.
Drizzle sriracha over top.
Eat immediately; I just use a small spoon and dig right in.
Notes
Nutritional information is provided as a courtesy only and should be construed as an estimate rather than a guarantee. Ingredients can vary and Salt & Lavender makes no guarantees to the accuracy of this information.