Lemon-Rosemary Cod with Roasted Asparagus
Flaky cod fillets baked with fresh rosemary and lemon, served with tender roasted asparagus for a light, satisfying meal. This mediterranean-inspired seafood (whole30) ready in about 30 minutes pairs (6 oz each) cod fillets, olive oil, thinly sliced lemon for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 270 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 4 (6 oz each) cod fillets
- 2 tbsp olive oil
- 1, thinly sliced lemon
- 2 tsp, finely chopped fresh rosemary
- 1 lb, trimmed asparagus
- 1/2 tsp sea salt
- 1/4 tsp black pepper
Instructions
- Step 1: Preheat oven to 400°F. Pat cod fillets dry with paper towels and place on a parchment-lined baking sheet.
- Step 2: Whisk together 2 tbsp olive oil, 1/2 tsp sea salt, 1/4 tsp black pepper, 2 tsp chopped rosemary, and juice from half a lemon in a small bowl.
- Step 3: Brush the mixture evenly over each cod fillet, then top with 2 lemon slices per fillet.
- Step 4: Arrange 1 lb trimmed asparagus around the cod, drizzle with any remaining oil, and season with a pinch of salt.
- Step 5: Bake 12-15 minutes until cod is opaque and flakes easily with a fork, and asparagus is tender-crisp.
Frequently asked questions
How long does Lemon-Rosemary Cod with Roasted Asparagus take to make?
Total time is about 30 minutes (15 min prep + 15 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Lemon-Rosemary Cod with Roasted Asparagus?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep (6 oz each) cod fillets from drying out.
Can I substitute ingredients in Lemon-Rosemary Cod with Roasted Asparagus?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Lemon-Rosemary Cod with Roasted Asparagus for a different number of people?
The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
Is Lemon-Rosemary Cod with Roasted Asparagus whole30?
Yes — this recipe is tagged whole30 based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
What others are saying
- ★★★★★
My kids called it 'magic fish'—the rosemary wasn’t too strong for little palates. Will impress my in-laws next time!
- ★★★★★
Restaurant-quality in 30 minutes. The cod stayed flaky while the asparagus got that gorgeous char.
- ★★★★★
The lemon-rosemary balance was perfect—my husband even asked for seconds on the asparagus! A new weeknight favorite.
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