In a food processor, add the pumpkin, coconut oil, maple syrup, peanut butter and blend.
In a large bowl, add the oats, walnuts, pumpkin seeds, and add the pumpkin mixture.
Mix well with a spatula and spread on a baking tray that is lined with parchment paper.
Bake in a preheated oven at 150°C for 25-30 minutes, turning half way through.
Remove from the oven, let it cool on a room temperature, it will continue to harden even more.
Once it's cool, store it in an air-tight container or glass storage jar for up to 3 weeks.