Baked Cod Butternut Spinach

Featured in: Quick Cozy Dinners

This dish features tender cod fillets baked on a bed of sweet roasted butternut squash and fresh baby spinach. A bright tomato-herb sauce, infused with oregano, thyme, and smoked paprika, ties the flavors together. Simple steps include roasting squash, sautéing aromatics, combining a rich sauce, and baking everything to perfection. Garnished with fresh parsley and lemon wedges, it’s a wholesome, easy-to-make meal ideal for any evening.

Updated on Mon, 17 Nov 2025 12:37:00 GMT
Baked Cod with Butternut Squash and Tomato Herb Sauce, a colorful baked dish for dinner. Save
Baked Cod with Butternut Squash and Tomato Herb Sauce, a colorful baked dish for dinner. | nomiqo.com

Tender cod fillets baked atop sweet roasted butternut squash and wilted spinach, all nestled in a vibrant tomato-herb sauce. A wholesome, flavorful meal perfect for weeknights or entertaining.

The first time I made this dish, my family was surprised by how well the sweet squash paired with hearty fish and tangy tomato sauce. It's become a repeat request for both busy evenings and casual dinners with friends.

Ingredients

  • Cod fillets: 4 fillets (about 150 g / 5 oz each), skinless and boneless
  • Butternut squash: 500 g (1 lb), peeled and cut into 1.5 cm (½-inch) cubes
  • Fresh baby spinach: 120 g (4 cups)
  • Yellow onion: 1 medium, finely chopped
  • Garlic cloves: 2, minced
  • Canned crushed tomatoes: 400 g (14 oz)
  • Tomato paste: 2 tbsp
  • Olive oil: 2 tbsp
  • Dried oregano: 1 tsp
  • Dried thyme: 1 tsp
  • Smoked paprika: ½ tsp (optional)
  • Sea salt: ½ tsp, plus more to taste
  • Black pepper: ¼ tsp freshly ground, plus more for serving
  • Sugar or maple syrup: 1 tsp (optional, to balance acidity)
  • Fresh parsley: 2 tbsp, chopped (plus extra for garnish)
  • Lemon wedges: For serving
  • Freshly cracked black pepper: For serving

Instructions

Prep the oven and squash:
Preheat the oven to 200°C (400°F). Lightly grease a large ovenproof dish. Toss butternut squash cubes with 1 tbsp olive oil, a pinch of salt, and pepper. Spread in the baking dish and roast 15 minutes, until starting to soften.
Sauté aromatics:
Heat 1 tbsp olive oil in a skillet over medium heat. Sauté the onion for 3–4 minutes until translucent. Add garlic and cook 1 minute longer.
Build the tomato-herb sauce:
Stir in tomato paste and cook for 1 minute. Mix in crushed tomatoes, oregano, thyme, smoked paprika, salt, pepper, and sugar or maple syrup if using. Simmer 5 minutes for flavor.
Layer vegetables:
Remove the squash from the oven. Scatter spinach over squash, then pour sauce evenly over vegetables.
Add cod fillets:
Nestle cod fillets on top, seasoning lightly with salt and pepper. Cover the dish loosely with foil.
Bake:
Bake for 15–18 minutes, or until cod is opaque and flakes easily with a fork.
Garnish and serve:
Remove foil, sprinkle with fresh parsley, and serve with lemon wedges and black pepper.
This photo presents a mouthwatering tray of golden-baked cod with squash in tomato sauce. Save
This photo presents a mouthwatering tray of golden-baked cod with squash in tomato sauce. | nomiqo.com

This recipe quickly became my family's go-to baked fish dinner. My kids love scooping out extra squash and sauce for second helpings.

Required Tools

Large ovenproof baking dish, skillet, chefs knife, cutting board, foil.

Allergen Information

Contains fish. Gluten-free as written. Always check packaged products like tomato paste for potential allergens.

Nutritional Information (per serving)

Calories: 295 Protein: 34 g Total Fat: 7 g Carbohydrates: 23 g

Fragrant Baked Cod with Butternut Squash, a healthy, Mediterranean-inspired dinner with fresh herbs. Save
Fragrant Baked Cod with Butternut Squash, a healthy, Mediterranean-inspired dinner with fresh herbs. | nomiqo.com

This bright, flavorful dinner makes any evening feel special. Garnish generously with chopped parsley for a fresh finish.

Recipe FAQs

What is the best way to cook the cod fillets?

Bake the cod fillets until they become opaque and flake easily with a fork, about 15–18 minutes at 200°C (400°F).

Can I substitute butternut squash with another vegetable?

Yes, sweet potatoes or pumpkin cubes make great alternatives to butternut squash while maintaining similar texture and sweetness.

How do I prevent the fish from drying out?

Cover the baking dish loosely with foil during cooking to retain moisture and ensure the cod stays tender.

What herbs enhance the tomato sauce flavor?

Oregano, thyme, and fresh parsley add aromatic depth, while smoked paprika gives a subtle smoky touch.

Can this dish be prepared gluten-free?

Yes, it is naturally gluten-free as it uses fresh ingredients; just verify the tomato paste does not contain gluten additives.

Is there a recommended side to serve with this dish?

For a hearty meal, pair with quinoa, brown rice, or gluten-free crusty bread to complement the flavors and textures.

Baked Cod Butternut Spinach

Cod fillets baked atop roasted squash and spinach in a vibrant tomato-herb sauce.

Prep Duration
20 min
Cook Duration
35 min
Total Duration
55 min
Created by Chloe Bennett


Skill Level Easy

Cuisine Type Mediterranean-Inspired

Portions 4 Serving Size

Dietary Details No Dairy, No Gluten, Reduced Carbs

Ingredient List

Fish & Vegetables

01 4 skinless, boneless cod fillets (5 oz each)
02 1 lb butternut squash, peeled and cut into ½-inch cubes
03 4 cups fresh baby spinach
04 1 medium yellow onion, finely chopped
05 2 garlic cloves, minced

Tomato-Herb Sauce

01 14 oz canned crushed tomatoes
02 2 tbsp tomato paste
03 2 tbsp olive oil
04 1 tsp dried oregano
05 1 tsp dried thyme
06 ½ tsp smoked paprika (optional)
07 ½ tsp sea salt, plus more to taste
08 ¼ tsp freshly ground black pepper
09 1 tsp sugar or maple syrup (optional)
10 2 tbsp fresh parsley, chopped (plus extra for garnish)

For Serving

01 Lemon wedges
02 Freshly cracked black pepper

Recipe Steps

Step 01

Prepare Oven and Baking Dish: Preheat oven to 400°F and lightly grease a large ovenproof dish.

Step 02

Roast Butternut Squash: Toss butternut squash cubes with 1 tbsp olive oil, a pinch of salt, and black pepper. Spread evenly in the baking dish and roast for 15 minutes until just tender.

Step 03

Sauté Aromatics: While squash roasts, heat remaining 1 tbsp olive oil in a skillet over medium heat. Sauté onion until translucent, about 3–4 minutes. Add garlic and cook for 1 minute more.

Step 04

Simmer Tomato-Herb Sauce: Stir in tomato paste and cook for 1 minute. Add crushed tomatoes, oregano, thyme, smoked paprika, salt, black pepper, and optional sugar or maple syrup. Simmer for 5 minutes to blend flavors.

Step 05

Assemble Vegetables and Sauce: Remove roasted squash from oven. Distribute spinach evenly over the squash, then pour tomato-herb sauce atop the vegetables.

Step 06

Add Cod Fillets: Place cod fillets on top of the sauce and vegetables. Lightly season with salt and pepper. Cover loosely with foil.

Step 07

Bake the Dish: Bake for 15–18 minutes until cod is opaque and flakes easily with a fork.

Step 08

Garnish and Serve: Remove foil, sprinkle chopped parsley on top, and serve with lemon wedges and freshly cracked black pepper.

Tools Needed

  • Large ovenproof baking dish
  • Skillet
  • Chef's knife
  • Cutting board
  • Foil

Allergy Information

Review all ingredients for allergen risks and check with your healthcare provider for guidance.
  • Contains fish; gluten-free as prepared. Verify packaged ingredients for potential allergens.

Nutrition Info (per portion)

Provided only for reference purposes—don’t substitute for professional medical guidance.
  • Energy: 295
  • Lipids: 7 g
  • Carbohydrates: 23 g
  • Proteins: 34 g