Cube the salmon into about 1”x1” pieces.
In a large bowl, combine the sugar, salt, maple syrup, and honey. Add 2 cups of water and mix well.
Add the salmon and let marinate overnight.
When ready to cook, preheat your oven or smoker to 180°F.
For the oven, line a baking sheet with foil. For the smoker, cover the grates with foil.
Set the salmon pieces, spread out, on the foil. Cook or smoke for 1 hour. If using the smoker, add sweet wood chips, like apple or cherry. Save the marinade.
While the salmon is cooking, put the remaining marinade in a pot and bring to a simmer. Simmer for 10 minutes, until reduced by half. Skim off any protein that collects on the surface.
After 1 hour, flip the cubes of salmon and brush with the glaze. Smoke for up to 4 hours, brushing with glaze every 45 minutes, until the salmon’s internal temperature reaches 160°F
Serve hot.