I use normal pesto in the link below, but you could easily make a raw vegan pesto (i.e. remove the cheese!) to make the whole dish completely raw and vegan.
Slice zucchini into thin strands (use a spiralizer, julienne slicer, or resort to a mandolin or veggie peeler and knife). If you have really picky people, you can remove the skin first but I like it with strands of the green skin showing! The "noodles" look like this: