Artificial Food Coloring Free Cilantro-Lime Mackerel with Fennel & New Potatoes Sheet Pan Dinner
Sheet pan dinners are weeknight heroes, and this one delivers bold, vibrant flavor without a single synthetic dye or artificial additive in sight. Every color on the plate comes from real food — the golden turmeric-kissed marinade, the caramelized edges of roasted new potatoes, the anise-sweet fennel softening in the oven heat. Mackerel is a deeply savory, omega-rich fish that soaks up the cilantro-lime marinade beautifully, and the combination of fresh lime juice, zest, garlic, and cumin makes the flesh taste bright and complex without any shortcuts. For anyone navigating artificial coloring concerns, this recipe is reassuringly straightforward — every ingredient is whole, fresh, or a single-ingredient spice. The technique is just as clean as the ingredient list: roast the vegetables first, nestle the marinated fillets into the center, and let the oven do the rest. Scattered fennel fronds and a squeeze of lime at the table pull everything together with a little freshness that feels almost restaurant-worthy. It's the kind of dinner that looks impressive but asks very little of you on a busy evening.
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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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