Rosemary grilled cod with garlic and onion

Rosemary grilled cod with garlic and onion combines the robust flavours of rosemary and garlic with the sweetness of onion powder, creating a delicious seafood dish. This easy recipe involves marinating the cod before grilling it to perfection, ideal for weeknight dinners or special occasions.

16 Dec 2025
Cook time 15 min
Prep time 10 min

Ingredients:

1 garlic clove
1 tsp olive oil
1 dash black pepper
1 dash salt
1 tsp rosemary
1 tsp onion powder
8 oz cod

Rosemary grilled cod with garlic and onion is a delightful and healthy dish that combines the robust flavors of rosemary, the subtle sweetness of garlic, and the aromatic presence of onion powder. This simple yet elegant recipe is perfect for a quick weeknight dinner or a sophisticated weekend meal. Follow the steps below to create a delicious and nutritious seafood experience.

Instructions:

1. Prepare the Marinade:
- In a small bowl, combine the minced garlic, olive oil, black pepper, salt, rosemary, and onion powder. Mix well to create a fragrant marinade.

2. Marinate the Cod:
- Pat the cod fillet dry with a paper towel.
- Place the cod fillet in a shallow dish and coat it evenly with the prepared marinade. Make sure all sides are well-covered.
- Let the fish marinate for at least 15-30 minutes. This allows the flavors to penetrate and infuse the cod.

3. Preheat the Grill:
- Preheat your grill to medium-high heat (about 400°F or 200°C).
- If using a charcoal grill, wait until the charcoal is covered with white-gray ash before you start grilling.

4. Grill the Cod:
- Lightly oil the grill grates to prevent sticking.
- Place the marinated cod fillet on the preheated grill.
- Grill the cod for about 3-4 minutes on each side, or until the fish is opaque and flakes easily with a fork. The internal temperature should reach 145°F (63°C).

5. Serve:
- Remove the grilled cod from the grill and let it rest for a minute or two.
- Transfer the cod to a serving plate. Garnish with a sprig of rosemary, if desired.

6. Enjoy:
- Serve the rosemary grilled cod with your favorite sides, such as grilled vegetables, a fresh salad, or roasted potatoes.

Rosemary grilled cod with garlic and onion is both delicious and easy to prepare. By following the tips outlined above, you can ensure a perfectly cooked, flavorful dish every time. Whether you're hosting a dinner party or enjoying a quiet night in, this recipe is sure to impress and satisfy. Serve your rosemary grilled cod with a side of fresh vegetables or a light salad for a complete and nutritious meal.

Rosemary grilled cod with garlic and onion FAQ:

What is the ideal grilling time for cod?

Grill the cod for about 3-4 minutes on each side. The fish is done when it is opaque and flakes easily with a fork, reaching an internal temperature of 145°F (63°C).

How can I store leftover grilled cod?

Store leftover grilled cod in an airtight container in the refrigerator for up to 2 days. Reheat gently to avoid drying it out.

What can I use as a substitute for cod in this recipe?

You can substitute cod with other firm white fish like haddock or halibut. Adjust the grilling time as needed based on the thickness of the fillet.

Can I use dried rosemary instead of fresh rosemary?

Yes, you can use dried rosemary in place of fresh. Use about half the amount, as dried herbs are more concentrated than fresh.

What should I do if my cod sticks to the grill?

To prevent sticking, ensure that the grill grates are well-oiled before placing the cod on them. If it does stick, gently use a grill spatula to loosen the edges.

Cooking Tips:

- Choose Fresh Cod: For the best flavor, use fresh cod. Look for fish that is firm, with a fresh, mild scent. If fresh isn't available, high-quality frozen cod is a good alternative.

- Marinate for Enhanced Flavor: Allow the fish to marinate in the garlic, rosemary, onion powder, salt, and pepper mixture for at least 15-20 minutes before grilling. This helps the flavors to penetrate the fish more deeply.

- Preheat Your Grill: Ensure the grill is properly preheated to medium-high heat before cooking. This will help to create a nice sear on your cod without overcooking it.

- Use a Grill Basket or Foil: To prevent the cod from sticking to the grill and breaking apart, use a grill basket or aluminum foil. Lightly oil the basket or foil before placing the cod on it.

- Monitor Cooking Time: Cod cooks quickly, usually in about 6-8 minutes. Keep a close eye on it to avoid overcooking. The fish should be opaque and easily flake with a fork when done.

Nutrition Facts

1 Servings
Calories 160kcal
Protein 36g
Carbohydrates 0.91g
Fiber 0.11g
Sugar 0.03g
Fat 5g

Rosemary grilled cod with garlic and onion