NOTE: *Before you start, keep in mind that if you're not using parmesan, for the purposes of this recipe, the pili nuts and sea salt are sort of like garnishes. You should only prepare proportionally enough of them for the amount of pesto you plan to make at that moment. This recipe will make about 6 patties (I generally use 3 of those on two medium chicken breasts, for reference).
Wash your basil, and then dry it gently and pluck off each leaf. Place them into your mixing bowl, trying to get as little of the stems as possible. If it adds up to a little more or less basil, simply add a little more or less of the garlic & oil.
Peel your garlic cloves; you can chop them into a few pieces each, if your food processor is weak.
Pack the basil, garlic, and pecans into the food processor, and blend it until a chunky paste, about 30 seconds. Then pour in the oil slowly (or all at once if that's not possible), until the pecan pesto has smoothed out.
Assuming you're not using all of this pesto at once, this is where the parchment paper comes in. Pull off a piece that's about 10 inches long, wide enough for 6 pesto patties, and lay it onto a flat surface.
Plop 6 even patties onto the bottom third of the sheet, and then fold the top on the patties and press lightly. Transfer these directly into the freezer for about an hour, placing them on a flat surface with a lightweight flat object on top of them. This will keep the parchment paper sticking to either side, allowing for easy storage.
After an hour or two, take the patties out of the open freezer and make sure they're solidly frozen, or even better, you can leave them overnight to harden.
Once fully-frozen, peel apart the wax paper and stack the patties in a freezer-safe container for storage. From a lifetime of experience, they'll stay good for several years in the freezer, though they'll brown quite a bit after the first month. When you're preparing your pesto for serving later on, a single patty calls for 10-12 salted pili nuts, if you didn't use parmesan. Toast the pili nuts before serving, for an extra crunch, and roughly chop them to top your main dish. Add salt & pepper as desired, and enjoy.