Turkey Free Cilantro-Lime Mackerel with Fennel & New Potatoes Sheet Pan Dinner
Sheet pan dinners are the weeknight hero nobody talks about enough, and this one delivers serious flavor with minimal cleanup. Mackerel is the star here — a rich, meaty fish that soaks up the bright cilantro-lime marinade beautifully, with cumin and turmeric adding warm, earthy depth and a touch of red pepper flakes for gentle heat. The skin-on fillets roast right alongside golden new potatoes and caramelized fennel wedges, so everything comes together on a single pan in one cohesive, satisfying meal. Because this dish is built entirely around fish, fresh produce, and pantry spices, there's no poultry anywhere in the picture — not tucked into a sauce, not hiding in a broth, nowhere. The fennel is a quietly brilliant addition: it softens and sweetens in the oven, playing off the citrusy marinade in a way that feels almost restaurant-worthy. A squeeze of fresh lime over the top right before serving ties every element together and makes the whole thing pop. This is the kind of recipe that looks impressive on the plate but asks very little of the cook.
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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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