Place the salmon, red onion. dill, dijon mustard, paprika, cumin, coriander, breadcrumbs and salt in the bowl of a food processor and blend for about 30 seconds until combined.
Wet your hands with cold water and divide the mixture into 6 pieces. Gently form each piece into patties and press the middle to make a small indentation.
Place the burgers on a baking sheet lined with parchment paper and refrigerate for 30 minutes. Meanwhile, preheat the grill to medium high.
Make the yogurt garlic sauce by mixing the yogurt, minced garlic, salt, pepper, lemon juice and dill in a bowl. Cover and refrigerate until ready to serve.
Once your ready to grill, rub half a potato on the grill grates, the starch in the potato makes the grates nonstick. Alternatively, you can brush the grates with olive oil.
Grill the salmon burgers for 4 to 5 minutes on each side. Toast the burger buns and assemble the burgers using the sauce and your preferred fixings.