Pre-heat oven to 400°F and line a baking sheet with parchment paper.
Slice sweet potato into 1/2 inch rounds and toss with olive oil and sea salt.
Place sweet potato rounds on the parchment lined baking sheet and roast for 30 minutes, or until tender.
While sweet potato is cooking, mix all tuna salad ingredients in a large bowl. Taste and adjust seasoning as desired.
Slice topping ingredients and set aside.
Once sweet potato buns are ready, place 3 tablespoons of tuna salad on each of the buns. Top with tomato, avocado, lettuce or any other toppings you desire!
If adding cheese, top each slider with a thin slice of cheddar cheese. Broil on high for 3-4 minutes, or until cheese has melted completely.