Assembly
Step 1
Preheat oven to 400ºF. Poke holes all over each potato and place onto a baking sheet with a rack. Drizzle with olive oil and rub to coat the potatoes evenly. Bake for at least 1 hour, or until soft enough to pierce a skewer through easily.
Step 2
Meanwhile, prepare tuna salad by combining drained tuna, Spicy Serrano Mayo, red onion, cornichons, Hot Deli Mustard, celery, and lemon juice. Season with salt and black pepper.
Step 3
Once potatoes are done, set oven to broil or to 475ºF. Carefully cut potatoes open, but not all the way through, either in half lengthwise or into quarters. Open and fill both potatoes evenly with tuna salad. Top with shredded cheese and transfer back to oven, until cheese has melted.
Step 4
Top with chives and serve.