Core, peel and dice the apples. Combine with butter/margarine and wine in a saucepan over low heat. Cook until liquid has evaporated.
Puree apple mixture in food processor until smooth. The apple butter may be prepared up to one week in advance and refrigerated in a tightly sealed container.
Place salmon filets on lightly oiled cedar plank and season with salt and pepper.
Spread apple mixture over top of salmon.
Bake in 375 degree F oven for 30 minutes or until salmon feels firm when gently pressed.