I make Pesto all the time, put it on vegetables, tofu, noodles...
I just blend up some olive oil (ca. 1/2 cup with 2 or more cloves of garlic and some nuts (walnuts are great, if you can afford them, pine nuts), then add a large bunch of Basil and some salt.
You can make tons of it, just add more olive oil etc. if needed until you get a good creamy sauce. I never measure, just mix above ingredients as I like it and it always comes out great. If you want to make it a little lighter you could add some plain soymilk instead of all the oil. You can leave the nuts out too, still comes out good.