Preheat oven to 250°F and place parchment paper or silicone baking mat on sheet pan, spread oats, nuts, and flax meal evenly on sheet, bake for 20 minutes.

In large microwave safe bowl melt butter, then add maple syrup, pumpkin, spices, vanilla, and salt, mix well.

Add warm toasted oats and stir well to coat evenly.

Gently into parchment lined sheet pan all the way to the edges to form a smooth, even layer.

Bake for 75 minutes at 250°F (do not overcook!) place on cooling rack, allow to cool completely, then break up and place in airtight container with pepitas and raisins.