Add the dates to the bowl of a food processor fit with the steel blade and process until chopped. Remove the lid and add the nuts, quinoa and seeds and process until a meal has formed. Next, add the protein powder and process a few times until combined. Once you have a sandy text, add the peanut butter and honey and process until a thick dough forms.
Transfer the dough to a parchment lined baking pan. I used a loaf pan for skinny, thick loaves, but you can also use a square baking dish for bars that thinner. Place the bars in the freezer until set, about 1 – 2 hours. Remove from the freezer and slice into bars. Store in freezer until you’re ready to eat them.