Pulsing skinless salmon in a food processor makes homemade salmon burgers easier and fresher than ever. These are flavored with red onion and jalapeno, but you can add almost any aromatic you'd like. A spicy sesame-laced mayonnaise takes these burgers to the next level.
Preheat a grill pan, large cast-iron skillet or grill over medium-high heat. Oil the grill grates if using a grill.
Cut the salmon into 1- to 2-inch chunks and transfer to a food processor. Pulse in 1-second intervals until the salmon is finely ground but not yet a paste. Scrape the salmon into a medium bowl. Add the panko, minced onion, jalapeno, 1 teaspoon salt and 1/2 teaspoon pepper; mix well. Form the mixture into 4 patties.
Brush the salmon patties with oil and cook until nicely browned on the bottom, 3 to 4 minutes. Flip the patties and cook until browned and firm to the touch, 3 to 4 minutes longer.
Meanwhile, whisk together the mayonnaise, sriracha and sesame oil in a small bowl; season with salt and pepper.
Transfer the salmon patties to a plate or baking sheet; tent with foil. On the grill, grill pan or in the skillet, toast the buns until lightly browned, 1 to 2 minutes. Put the salmon patties in the buns. Top the patties with sriracha-sesame mayo, lettuce, sliced onion and cucumber and serve.