To the pan with the pumpkin seeds, add the pepitas, pistachios, flax, maple syrup, coconut oil, vanilla extract, coffee grounds (I used 2 tablespoons), salt, cinnamon, nutmeg and all-spice. Toss well, making sure all the seeds are evenly coated. Bake for 25-30 minutes, stirring 2 or 3 times during cooking until the pumpkin seeds are golden in color. Remove from the oven and using the back of a rubber spatula push the seeds into an even layer about 1/2 inch thick. Allow the seeds to cool completely (as they cool they will harden). Break up into clusters.