Green goddess salad dressing for non-believer's

What's up with the title? Tonight my 17 year old son ate a hearty dinner of leftover Penne a la vodka (soy milk) and a ckn cutlet but I sensed he'd eat more. I offered to make some veggies I knew he liked, like broccoli, carrots, corn and salad. He agreed to the salad as long as it didn't have a lot of "stuff" in it. Basic greens, maybe grated cheese, carrots and a "normal" dressing. What he got was a mixture of spinach, Romaine, red leaf lettuce, green leaf lettuce, grated Swiss, grated carrots and a tomato. The magic was in the dressing (though the green combo was a big "stretch"). In the Blender went 1/2 cup pineapple juice (it was left over), 2 cloves of garlic, about 10 walnuts, 2 big handfuls of spinach, S and P and 2 tsp of oil (bc it was for him, I caved and added it though usually the walnuts would serve as the fat). After the first blend, I added 2 T of apple cider vinegar. I tossed some on the salad, topped with croutons (had to make it more believable and mask the green dressing, somewhat). He finished a big bowl, then asked for more. It's hard when he asks me what's in something. I want  to tell him so after he agrees he likes something, it'll prove 'unconventional' ingredients. can be substituted, but it's a fine line. So I told him about the pineapple juice, oil, vinegar garlic and S + P. Can't mention the spinach and walnuts just yet. I'll have to sell it a few more times. Later, when I offered him a carrot with the dressing, he looked at the dressing and said, no way....Now you know where I'm coming from.