Baked Cod with Lemon-Garlic Green Beans and Roasted Sweet Potatoes

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Flaky baked cod fillets seasoned with lemon and garlic, served alongside crisp-tender green beans and caramelized sweet potatoes for a colorful Whole30 dinner. This whole30 (gluten free, dairy free) ready in about 45 minutes pairs (6 oz each) cod fillets, divided sea salt, divided black pepper for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 360 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.

Prep: 15 min Cook: 30 min Serves 4 Whole30 cuisine 360 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 425°F. Toss 2 peeled and cubed medium sweet potatoes with 2 tbsp extra virgin olive oil, 1/2 tsp sea salt, and 1/2 tsp black pepper. Spread on a baking sheet and roast for 25-30 minutes until tender and caramelized, tossing halfway.
  2. Step 2: Meanwhile, place 4 cod fillets (6 oz each) on a parchment-lined baking sheet. Drizzle with 1 tbsp olive oil and sprinkle 1 tsp sea salt, 1/2 tsp black pepper, 1 tsp lemon zest, and 3 minced garlic cloves evenly over the fillets. Drizzle with 2 tbsp lemon juice.
  3. Step 3: Bake cod in the oven alongside sweet potatoes for 12-15 minutes until fish flakes easily with a fork.
  4. Step 4: While fish and potatoes cook, heat remaining 1 tbsp olive oil in a large skillet over medium heat. Add 1 lb trimmed green beans and sauté for 6-7 minutes until crisp-tender. Season with 1/2 tsp sea salt, 1/2 tsp black pepper, and stir in 2 tbsp chopped fresh parsley.
  5. Step 5: Plate the baked cod fillets with warm roasted sweet potatoes and lemon-garlic green beans for a balanced Whole30 meal.

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Frequently asked questions

How long does Baked Cod with Lemon-Garlic Green Beans and Roasted Sweet Potatoes take to make?

Total time is about 45 minutes (15 min prep + 30 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 Baked Cod with Lemon-Garlic Green Beans and Roasted Sweet Potatoes?

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 Baked Cod with Lemon-Garlic Green Beans and Roasted Sweet Potatoes?

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 Baked Cod with Lemon-Garlic Green Beans and Roasted Sweet Potatoes 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 Baked Cod with Lemon-Garlic Green Beans and Roasted Sweet Potatoes gluten free?

Yes — this recipe is tagged gluten free, dairy free based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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