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Pescatarian Sheet Pan Mahi Mahi with Garlic Lemon Green Beans

By PanPotPlates Test KitchenReviewed by PanPotPlates Editorial TeamPublished Apr 25, 2026 · Updated May 12, 2026
Mediterranean-Inspired 25 mins sheetpanonepanpescatarianquickeasyhealthyfamily-friendlyglutenfreedairyfreelighttimessaver

Enjoy a Mediterranean-inspired, healthy pescatarian meal with this quick and easy sheet pan dinner. Tender mahi mahi fillets roast perfectly alongside crisp green beans tossed in a zesty garlic lemon sauce. Ideal for family-friendly weeknights, this light, gluten-free, and dairy-free recipe delivers maximum flavor with minimal cleanup.

Pescatarian Sheet Pan Mahi Mahi with Garlic Lemon Green Beans
Prep 10 min
Cook 15 min
Total 25 min
Servings 4
Difficulty easy
Cuisine Mediterranean-Inspired

Recipe Details

Prep10 min
Cook15 min
Total25 min
Servings4
Difficultyeasy
CuisineMediterranean-Inspired
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Ingredients

Servings 4
  • 4 mahi mahi fillets (about 6 ounces each), skin removed
  • 1 pound fresh green beans, trimmed
  • 3 tablespoons olive oil, divided
  • 3 cloves garlic, minced
  • 1 lemon, zested and juiced
  • 1 teaspoon dried oregano
  • 1/2 teaspoon smoked paprika
  • Salt and freshly ground black pepper, to taste
  • 1/4 teaspoon crushed red pepper flakes (optional)
  • Fresh parsley, chopped (for garnish)

Instructions

  1. Preheat oven to 425°F (220°C). Line a large rimmed sheet pan with parchment paper or lightly grease it.
  2. In a large bowl, toss trimmed green beans with 1 1/2 tablespoons olive oil, half the minced garlic, half the lemon zest, salt, pepper, and crushed red pepper flakes if using until evenly coated.
  3. Spread the green beans in a single layer on one side of the sheet pan.
  4. In the same bowl, add mahi mahi fillets and drizzle with remaining 1 1/2 tablespoons olive oil, remaining minced garlic, lemon juice, remaining lemon zest, dried oregano, smoked paprika, salt, and pepper; toss gently to coat evenly.
  5. Arrange mahi mahi fillets on the empty side of the sheet pan.
  6. Roast for 12-15 minutes, until mahi mahi is opaque and flakes easily and green beans are tender-crisp.
  7. Remove from oven and sprinkle chopped fresh parsley over the dish.
  8. Serve immediately, drizzling any pan juices over the fish and green beans.

Frequently Asked Questions

Reader questions and answers for this recipe will appear here.

Customize this easy and healthy sheet pan dinner while keeping it pescatarian and family-friendly by trying these ingredient substitutions based on your preferences or availability:

  • Mahi Mahi Fillets: Substitute with firm white fish like cod, halibut, or tilapia for similar texture and mild flavor.
  • Fresh Green Beans: Swap with asparagus, broccolini, or snap peas for seasonal variation with crisp texture.
  • Olive Oil: Use avocado or grapeseed oils, which offer a neutral flavor and high smoke point.
  • Garlic: Garlic powder can replace fresh minced garlic if needed, though fresh yields best aroma.
  • Lemon: Lime juice and zest provide a bright citrus alternative.
  • Dried Oregano: Substitute with dried thyme, basil, or Italian herb blends for varied herbal notes.
  • Smoked Paprika: Replace with regular paprika or chili powder for mild heat and color.
  • Fresh Parsley: Fresh cilantro or basil leaves also add a fresh, vibrant finish.

These swaps maintain the dish’s light, healthy, gluten-free, and dairy-free qualities, making it perfect for quick weeknight meals with minimal cleanup.

Pan Or Pot Required

For the best results with this vibrant, healthy Sheet Pan Dinner, use a large rimmed sheet pan to roast mahi mahi and garlic lemon green beans evenly. This one-pan method minimizes cleanup while ensuring perfectly cooked fish and crisp vegetables, making it a quick and easy meal for busy weeknights.

Choose a sturdy sheet pan that allows spreading ingredients in a single layer without crowding, which promotes even roasting and caramelization. Lining it with parchment paper or lightly greasing prevents sticking and simplifies cleanup, extending your cookware’s life.

This cookware choice perfectly suits the recipe’s tags: quick, easy, healthy, family-friendly, glutenfree, dairyfree, light, and timessaver, facilitating a flavorful meal with minimal fuss.

No pots are needed for this dish, ideal for cooks who want to reduce kitchen cleanup without sacrificing delicious results.

Cookware Size Guidance

Use a large rimmed baking sheet (at least 15x10 inches) for this Sheet Pan Dinner to provide enough space for mahi mahi fillets and green beans. Spreading ingredients out prevents overcrowding, ensuring each piece roasts evenly and the green beans remain crisp-tender. The rim also captures juices, enhancing flavor while simplifying cleanup.

If preparing more than 4 servings, consider using two sheet pans to maintain proper spacing and roasting quality.

Cookware Swap Guidance

While a large rimmed sheet pan is ideal for this Sheet Pan Dinner, here are alternative cookware options that preserve the ease and quality of the recipe:

  • Large Baking Dish or Casserole Pan: Use a shallow glass or ceramic dish to arrange fish and vegetables in a single layer. Cooking times may vary; monitor for doneness.
  • Oven-Safe Skillet: A large cast iron or stainless steel skillet works well for oven roasting, providing great heat retention and caramelization.
  • Roasting Pan: A sturdy roasting pan accommodates even ingredient distribution for uniform roasting.
  • Multiple Smaller Cookie Sheets: Use two cookie sheets lined with parchment, spreading ingredients to avoid overcrowding.

Avoid deep pots or slow cooker vessels, as roasting at high heat is critical for flavor and texture. These swaps keep the recipe quick, easy, healthy, and family-friendly, aligned with PanPotPlates’ standards for Sheet Pan and One-Pan meals.

Leftovers Quality

This Pescatarian Sheet Pan Mahi Mahi with Garlic Lemon Green Beans reheats well for easy meal prep or next-day dinners. Store leftovers in airtight containers in the refrigerator for up to 2 days to preserve freshness and texture.

Storage Tips: Allow leftovers to cool to room temperature before refrigerating promptly to maintain quality. The recipe’s gluten- and dairy-free nature aids in freshness retention without separation.

Freezing: Cooked mahi mahi and green beans can be frozen separately in airtight containers for up to 1 month. For best results, thaw overnight in the refrigerator.

Reheating: Warm leftovers gently in a skillet over medium-low heat to retain moisture and crispness, or reheat in a 325°F (165°C) oven for 10-15 minutes covered loosely with foil to prevent drying. Avoid microwaving to maintain texture.

Properly stored and reheated, this healthy sheet pan meal remains a convenient and flavorful option for busy families seeking quick pescatarian dinners.

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