I had a snack last night that was really delicious, along similar lines. I put half a teaspoon of sunflower oil into a non-stick pan, added 10 almonds and 10 grams of pumpkin seeds, 1 teaspoon of xylitol and a generous shake of cinnamon. Fried everything for about 10 minutes at a fairly low heat, stirring regularly. I think I could probably have added the xylitol and cinnamon at the end - will do that next time as it was so good there will definitely be a next time. I love walnuts, too, and I think your plan for them will be delicious.