In a small bowl combine the BBQ sauce, pineapple juice, lime juice, coriander, salt and pepper and mix well to combine. Set aside for later.
Add salmon to the bowl of a food processor and pulse until it’s somewhat minced. You can also chop the salmon very finely with a sharp knife.Remove and add salmon to a bowl with the panko bread crumbs, parmesan and 2 tablespoons of the BBQ sauce from step 1 (save the rest for serving) and mix with a spoon until just combined.
Form into 4 equally sized burgers.
Heat a skillet or pan to a medium-high heat with a tablespoon of coconut oil. Cook burgers on each side until golden, about 3-4 minutes per side. During the last minute of cooking add the swiss cheese and the jalapeños, if using.
In a separate pan heat the remaining 2 tablespoons of coconut oil and place the pineapple slices in the pan.
Cook for about 3-4 mins, flip and cook another 3-4 minutes.
To assemble place a piece of lettuce on the bottom of a bun, then the burger, mashed or sliced avocado and a ring of pineapple. Drizzle each burger with the remaining BBQ sauce.