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Roasted cauliflower with capers, parsley and lemon zest on a rust-red platter
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Roasted Frozen Cauliflower with Lemon Caper Dressing

Frozen cauliflower roasted from frozen until tender and browned, then finished with a bright chopped-caper, lemon and parsley dressing.
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Prep Time 10 minutes
Cook Time 35 minutes
Total Time 45 minutes
Servings: 4 side servings
Ingredients Equipment Method Notes

Ingredients
  

Roasted cauliflower
  • 1 pound plain frozen cauliflower florets keep frozen until the oven is hot
  • 1 1/2 tablespoons olive oil
  • 1/4 teaspoon garlic powder
  • 1/4 teaspoon fine salt
  • 1/4 teaspoon black pepper
Lemon caper dressing
  • 1 tablespoon capers drained, rinsed and finely chopped
  • 1 tablespoon olive oil
  • 1 tablespoon lemon juice plus more only after tasting
  • 1/2 teaspoon finely grated lemon zest
  • 2 tablespoons chopped flat-leaf parsley
  • 1 teaspoon water optional, if needed to soften a sharp dressing

Equipment

  • 1 18-by-13-inch rimmed metal baking sheet A shallow sheet lets moisture escape.
  • 1 Large mixing bowl
  • 1 Small bowl For the lemon caper dressing.
  • 1 thin spatula For turning tender florets without dragging them.

Method
 

Roast and finish
  1. Place a rack in the middle of the oven and preheat to 425°F / 220°C. Lightly grease a rimmed metal baking sheet with a little of the measured roasting oil.
  2. Keep the cauliflower frozen until the oven is ready. Shake off large ice crystals and separate clumps. Do not rinse under warm water.
  3. Toss the frozen florets with the remaining roasting oil, garlic powder, salt and pepper. Spread in one layer with open metal between pieces and turn broad cut faces downward where possible.
  4. Roast undisturbed for 18–20 minutes. The cauliflower should release much of its moisture and begin browning underneath.
  5. Turn with a thin spatula and roast for another 10–20 minutes, following the package instructions and checking small pieces first. Thick stems should be hot and tender, with some browned edges. Remove dark finished pieces individually if needed.
  6. Stir the chopped capers, 1 tablespoon olive oil, lemon juice, zest and parsley in a small bowl. Taste a little dressing on a cooked floret. Add the optional water if it is too sharp, or a few drops of lemon if it tastes flat.
  7. Transfer the cauliflower to a broad serving bowl. Add about two-thirds of the dressing and toss gently once. Offer the rest at the table and serve promptly so the roasted edges do not sit in liquid.

Notes

  • Yield and timing: Makes 4 side servings. Allow 10 minutes to prepare and approximately 35 minutes to roast, about 45 minutes total. Frozen floret size and ice coverage vary; expect roughly 30–40 minutes and follow the package cooking requirements.
  • Pan and oil: Use an 18-by-13-inch rimmed metal sheet at 425°F (220°C). The 1½ tablespoons roasting oil includes the small amount used to grease the sheet. The separate tablespoon of oil belongs to the dressing.
  • Keep frozen: Separate clumps and shake off large ice crystals without thawing or rinsing the florets. Leave open metal between pieces. Remove small finished florets while thicker stems finish if necessary.
  • Dressing: Rinse and chop capers, then taste the dressing on a cooked floret before adding more salt or lemon. Start with about two-thirds of the dressing and serve the remainder separately to protect the roasted edges.
  • Leftovers: Refrigerate shallow portions within 2 hours, or 1 hour above 90°F (32°C), at 40°F (4°C) or below. Use within 3–4 days and reheat to 165°F (74°C). FoodSafety.gov storage guidance.