This super-simple sauce was inspired by the tarragon tang and beautiful color of green goddess dressing. It's rich yet has a sharp bite and highlights the briny sweetness of crab. Prep Time: 15 minutes (plus 30 minutes resting time).
2 ripe avocados, pitted and peeled
1/2 cup olive oil
1/4 cup white wine vinegar
1/2 teaspoon salt, plus more to taste
1/2 cup finely chopped fresh chives (about 2 bunches)