Sheet Pan Lemon Dill Cod is a simple, fresh dinner that’s light and full of bright flavors. Tender cod fillets bake alongside slices of lemon and sprigs of dill, all drizzled with a bit of olive oil. The lemon adds a nice zing while the dill brings a gentle herb aroma that pairs beautifully with the flaky fish.
I love how easy this dish is to throw together. Just lay everything on one pan, pop it in the oven, and in about 15 minutes you have a healthy meal with minimal cleanup. I usually sprinkle a little sea salt and pepper on top and sometimes add extra lemon wedges for squeezing at the table. It’s a perfect recipe for busy weeknights but special enough for guests.
One of my favorite ways to serve this cod is with a side of roasted vegetables or a simple green salad. The fresh flavors of lemon and dill make the fish taste bright and clean, so it doesn’t feel heavy. Every time I make it, I’m reminded of sunny summer evenings and easy dinners that feel a little fancy without the fuss.
Key Ingredients & Substitutions
Cod fillets: Cod is mild and flaky, perfect for this recipe. If you can’t find cod, try haddock, pollock, or even tilapia for similar texture and flavor.
Baby potatoes: These roast nicely and hold their shape. You can swap with fingerling potatoes or small Yukon golds. Just cut larger potatoes into small, even pieces.
Asparagus and fennel: Asparagus adds a subtle earthy taste while fennel brings a hint of sweet licorice flavor. You could replace fennel with thinly sliced onions for a different, milder aroma.
Lemon: Fresh lemon slices and juice brighten the dish. Avoid bottled lemon juice if possible since fresh lemon gives a clean, vibrant taste.
Dill: Dill pairs beautifully with fish and lemon here. If you don’t have fresh dill, try fresh parsley, tarragon, or a sprinkle of dried dill, but fresh is best for aroma.
How Do I Get the Perfectly Cooked Cod Without Overcooking?
Cooking cod just right can be tricky because it cooks fast and can dry out. Here’s how to nail it every time on a sheet pan:
- Preheat oven to 400°F (200°C) for even cooking.
- Start roasting your potatoes first since they take longer.
- Add vegetables next, then place the cod on top so it cooks gently with the steam and heat around.
- Use lemon slices over the cod to keep it moist and add flavor.
- Bake for about 12-15 minutes—check doneness by gently flaking the fish with a fork. It should be opaque and separate easily.
- Avoid overbaking by keeping an eye on the cod after 12 minutes.
This timing keeps the fish tender and juicy without drying out. Plus, cooking everything together means the flavors meld beautifully!
Equipment You’ll Need
- Large sheet pan – I like it because it gives plenty of space for everything to cook evenly and makes clean-up a breeze.
- Mixing bowls – handy for tossing vegetables and seasoning the fillets so everything gets coated well.
- Sharp knife – essential for slicing potatoes, fennel, and lemon thinly and evenly.
- Cutting board – a stable surface for prep work and safety when slicing.
- Measuring spoons – for accurately dividing olive oil, garlic, and dill, ensuring the flavors are balanced.
Flavor Variations & Add-Ins
- Swap the dill for fresh parsley, tarragon, or basil for different fresh herb notes that match your taste or what’s in your fridge.
- Add sliced olives or capers before baking for a briny kick that pairs well with fish and lemon.
- Kick up the spice by sprinkling red pepper flakes over the vegetables or fish for a spicy touch.
- For heartier flavor, top the baked fillets with a spoonful of pesto or a sprinkle of grated Parmesan just before serving.
Sheet Pan Lemon Dill Cod
Ingredients You’ll Need:
For the Cod and Vegetables:
- 3 cod fillets (about 6 oz each)
- 1 lb baby potatoes, halved or whole if small
- 1 bunch asparagus, trimmed
- 1 cup cherry tomatoes
- 1 small fennel bulb, sliced
- 2 lemons, thinly sliced
- 3 tbsp olive oil, divided
- 2 tbsp fresh dill, chopped (plus extra sprigs for garnish)
- 2 garlic cloves, minced
- Salt and pepper, to taste
How Much Time Will You Need?
This dish takes about 10 minutes for prep and around 25 minutes total baking time. In about 35 minutes from start to finish, you’ll have a delicious, fresh, and healthy meal ready to enjoy.
Step-by-Step Instructions:
1. Prepare Potatoes:
Preheat your oven to 400°F (200°C). Toss the baby potatoes with 1 tablespoon of olive oil, salt, and pepper. Spread them out evenly on a large sheet pan and roast for 10 minutes to start cooking.
2. Add Vegetables:
While the potatoes roast, combine the asparagus, sliced fennel, cherry tomatoes, and half of the minced garlic with 1 tablespoon olive oil, salt, and pepper in a bowl. After the potatoes have roasted for 10 minutes, add this vegetable mixture around the potatoes on the sheet pan.
3. Prepare and Add Cod:
Drizzle the remaining 1 tablespoon olive oil over the cod fillets. Season them with salt, pepper, and the chopped dill. Carefully place the fillets between the vegetables on the sheet pan. Arrange lemon slices on top of the cod, and scatter remaining lemon slices over the vegetables.
4. Bake and Finish:
Return the sheet pan to the oven and bake for another 12–15 minutes, or until the cod looks opaque and flakes easily with a fork, and the vegetables are tender with some caramelized spots. Remove from oven, garnish with extra dill sprigs, and serve warm. Optionally squeeze fresh lemon juice over the cod for extra brightness.
Can I Use Frozen Cod for This Recipe?
Yes! Just make sure to fully thaw the cod in the refrigerator overnight before cooking. Pat it dry with paper towels to remove excess moisture so the fish roasts nicely on the sheet pan.
Can I Prepare This Meal Ahead of Time?
Absolutely! You can chop the vegetables and slice the lemons a few hours ahead and keep them covered in the fridge. Assemble and bake right before serving for the freshest taste.
How Should I Store Leftovers?
Place any leftover cod and vegetables in an airtight container and refrigerate for up to 2 days. Reheat gently in the oven or microwave to avoid drying out the fish.
What Are Good Side Dishes to Serve?
This dish is great on its own, but for extra heartiness, serve with a light salad, steamed rice, or crusty bread to soak up the lemony juices.