1
In a medium pot, bring 5 cups water (8 cups for 4 servings) to a boil, then reduce to a low simmer. (You’ll use it in Step 3.)
Wash and dry produce. Halve, peel, and dice half the onion (whole onion for 4). Trim and thinly slice scallions, separating whites from greens; mince greens. Peel and mince garlic. Zest and quarter lemon.