Drain the canned salmon and flake it into a medium bowl.
Add the egg, seasoned panko, Frank's hot sauce, light mayo, Dijon mustard, and chopped scallions to the bowl and mix until combined.
Preheat your mini waffle maker according to the manufacturer's instructions and spray both plates with olive oil spray.
Spoon about 1/4 cup of the salmon mixture into the center of the waffle maker for each cake, close and press until the maker's light indicates done or the edges are browned and crisp, about 3–4 minutes.
Carefully remove the waffled salmon cakes and repeat with the remaining mixture.
Serve the salmon cakes over greens or on buns with lemon wedges squeezed over the top.
Optional: make a quick remoulade by combining light mayo, lemon juice, and capers and drizzle over the cakes.