Preheat grill to 325°F (leaving half the grill off, creating an indirect cooking zone).
In a small bowl, combine maple syrup, mustard, olive oil, pepper, salt, dill & lemon juice. Place the salmon in a shallow dish or sheet pan and spoon about half of this mixture over the salmon in an even layer.
Place the Ontario Ambrosia Apple slices on the cedar plank in rows of 5 (slightly overlapping), then place the cedar plank on the lit side of the preheated grill. Leave the plank for 5 minutes (until it begins to dry out).
Move cedar plank to the indirect cooking zone and place salmon pieces on the apples (covering about ⅔ of the apples). Close the lid and cook for 15 minutes.
For the dressing, combine all ingredients into a small jar, seal lid tightly and shake well to combine.
After 15 minutes, spoon on the rest of the maple-mustard mixture on the salmon and cook for an additional 5-10 minutes or until an instant read thermometer reads 120°F-130°F.
Remove cedar plank to a clean sheet pan or platter and cover with foil (let rest 5 minutes before serving).
Combine all the salad ingredients with the dressing in a serving bowl, mix well to combine.
Place a spoonful of Ambrosia Apple Salad over each piece of salmon and present the entire cedar plank on the table. Plate a piece of salmon sitting on the baked apple slices for each guest and serve with more apple salad.