A 2:1 vinaigrette, not the standard 3:1. Standard dressings run 3 parts oil to 1 part acid. Fresh-picked snap beans carry natural plant starches and a sweet crunch that need a punchier ratio to cut through.
Macerating the garlic. Soaking microplaned raw garlic in acid tames its harsh sulfur compounds, and the natural emulsifiers in the garlic help bind the vinaigrette.
Thirty seconds, not four minutes. Dragon's Tongue beans carry striking purple stripes that vanish if overcooked. A 30-second flash sets the chlorophyll without breaking down the purple anthocyanin pigment.
