This has become a go-to dip over the years. The basil just makes it the perfect herby addition to vegetables (either raw or roasted), little small roasted new potatoes (my favorite with this), or chips. This green goddess dip is actually a spin-off of a dressing Ina Garten makes that I saw her whip up on her show. I add quite a bit more basil than she calls for, which helps make it more of a dip than a dressing. Whatever you call it, it is just darn tasty. It is also the easiest thing to make. Kind of a one mixer concoction sort of thing. I like to use a Cuisinart, but a blender will do the trick too.
Add 1 cup mayonnaise, 1 cup chopped scallions (using both the white and green parts), 2 cups fresh basil leaves, 1/4 cup lemon juice, 2 cloves of chopped garlic, 2 teaspoons of anchovy paste, 2 teaspoons of salt, 1 teaspoon of pepper, and 1 cup sour cream to the mixer. Pulse all until you get the consistency you desire. Sometimes I like it smooth, other times I like it where the basil is more visible. If you want more garlic, add more. If you want it to be extra pungent, add extra anchovy paste. There is no right or wrong on this. There is just yummy.