Nutmeg Free Cilantro-Lime Mackerel with Fennel & New Potatoes Sheet Pan Dinner
Sheet pan dinners don't get much more vibrant than this one — crispy-edged new potatoes, caramelized fennel wedges, and bold, flaky mackerel all coming together on a single pan with barely any cleanup. The marinade is the real star: fresh cilantro, bright lime juice and zest, garlic, cumin, and turmeric create a punchy, herbaceous coating that soaks into the flesh side of the fish while the vegetables get their head start in the oven. Mackerel is an underrated weeknight fish — rich, meaty, and deeply savory — and it takes on this citrus-spice blend beautifully. Many spice blends and store-bought seasonings sneak in nutmeg as a background note, but every flavor here is intentional and easy to verify, so you know exactly what's going on your plate. The technique is straightforward: roast the vegetables first, clear a lane in the center of the pan, then nestle the marinated fillets in for a final 8 to 12 minutes until they're opaque and flaking. A scatter of feathery fennel fronds and a squeeze of fresh lime over the top ties everything together with a little extra brightness. It's the kind of dinner that looks impressive enough for company but comes together on a Tuesday without breaking a sweat.
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Learn more →Ingredients
4 servings
For the sheet pan
- 1 ½ lb new potatoes, halved
- 1 large fennel bulb, cored and cut into ¾-inch wedges, fronds reserved
- 3 tbsp extra-virgin olive oil, divided
- ¾ tsp fine sea salt, divided
- ½ tsp black pepper, divided
For the marinade
- ¼ cup fresh cilantro leaves and tender stems, finely chopped
- 2 tbsp fresh lime juice (from about 2 limes)
- 1 tsp lime zest
- 2 garlic cloves, finely minced
- 1 tsp ground cumin
- ½ tsp ground turmeric
- ¼ tsp red pepper flakes
For the fish
- 4 mackerel fillets (about 5–6 oz each), skin-on, pin bones removed
For serving
- lime wedges, for serving
- reserved fennel fronds, roughly chopped, for serving (optional)
Instructions
- 1
Position a rack in the center of the oven and preheat to 425°F (220°C). Line an 18×13-inch rimmed sheet pan with parchment paper or foil.
- 2
Toss the halved new potatoes and fennel wedges on the prepared sheet pan with 2 tablespoons of the olive oil, 1/2 teaspoon of the salt, and 1/4 teaspoon of the black pepper until evenly coated. Spread in a single layer, cut sides down. Roast for 20 minutes, until the potatoes are just beginning to turn golden at the edges and the fennel is softened.
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