Poor Man's "shrimp" Cocktail

• dry crab boil seasoning (such as Zatarain's or Old Bay)1 cup
• kosher salt↗1⁄4 cup
• yellow onions, quartered↗2
• garlic cloves↗6
• lemons, halved crosswise↗3
• cauliflower, cored, trimmed into 2-inch florets↗
• seafood cocktail sauce

Step-by-step instructions

1. 1

   Combine crab boil, salt, onions, garlic, and 6 quarts water in a large pot. Squeeze juice from lemons into pot and add lemon halves. Set pot over high heat and bring liquid to a boil. Cook for 10 minutes to let flavors meld. Using a slotted spoon, remove onions, garlic, and lemons from broth; discard. Return liquid to a rolling boil.

2. 2

   Add cauliflower; turn off heat, cover pot tightly, and let stand until cauliflower is crisp-tender, 5-10 minutes. Drain; spread out cauliflower on a rimmed baking sheet and let cool completely. DO AHEAD: Cauliflower can be made 1 day ahead. Cover and refrigerate.

3. 3

   Arrange room-temperature or chilled cauliflower on a platter with cocktail sauce for dipping.