
Roasted Mussels with Caramelized Onion and Garlic
Prep
20 mins
Cook
35 mins
Servings
4
Difficulty
Medium
Roasted Mussels with Caramelized Onion and Garlic combines fresh mussels with sweet caramelized onions and garlic, finished with white wine and vegetable broth. This elegant dish features aromatic thyme and bay leaf for depth of flavour. With 20 minutes of preparation and 35 minutes of cooking, it makes an impressive dinner for those seeking a restaurant quality seafood meal at home.
Ella x
Ingredients
- 1 kgfresh mussels(debearded and cleaned)
- 3 largeyellow onions(thinly sliced)
- 6garlic cloves(minced)
- 237 mldry white wine
- 118 mlvegetable broth
- 3 tablespoonsbutter(divided)
- 2 tablespoonsolive oil
- 2 sprigsfresh thyme
- 1bay leaf
- 1 teaspoonsea salt(to taste)
- ½ teaspoonblack pepper(freshly ground)
- 1lemon(zest and juice)
- 3 tablespoonsfresh parsley(chopped)
Detail level
Instructions
- 1
Preheat your oven to 425°F (220°C). Heat 1 tablespoon of olive oil and 1 tablespoon of butter in a large skillet over medium heat.
Tip: Use a heavy-bottomed skillet for even heat distribution when caramelizing onions.
- 2
Add the sliced onions and cook for 15-18 minutes, stirring occasionally, until deeply golden brown and caramelized. Season with a pinch of salt and set aside.
Tip: Don't rush this step—slow caramelization develops the onions' natural sweetness.
- 3
In the same skillet, add the remaining 1 tablespoon of olive oil and 2 tablespoons of butter over medium-high heat. Add the minced garlic and cook for 1-2 minutes until fragrant.
Tip: Keep the heat moderate to prevent the garlic from burning.
- 4
Pour in the white wine and vegetable broth, then add the thyme sprigs and bay leaf. Bring the mixture to a simmer.
Tip: The wine will deglaze the pan and create a flavorful base for the mussels.
- 5
Return the caramelized onions to the skillet and stir to combine with the broth mixture. Place the cleaned mussels directly into the skillet, distributing them evenly.
Tip: Discard any mussels that are already open and don't close when tapped.
- 6
Transfer the entire skillet to the preheated oven and roast for 8-10 minutes, until all the mussels have opened. Discard any that remain closed.
Tip: Opened mussels mean they're perfectly cooked—overcooked mussels become rubbery.
- 7
Remove from the oven and stir in the lemon zest and fresh lemon juice. Taste and adjust seasoning with sea salt and freshly ground black pepper as needed.
Tip: The acidity of lemon brightens the rich, savory flavors.
- 8
Divide the mussels and caramelized onion mixture among four serving bowls, pouring the broth generously over each. Garnish with fresh chopped parsley and serve immediately with crusty bread for soaking up the flavorful liquid.
Tip: Serve in shallow bowls to capture all the delicious broth.
Recipe Variations
Get AI-powered ingredient substitution suggestions.
You Might Also Like

Crispy seabass with preserved lemon yogurt
This is one of my favorite quick weeknight dinners because it comes together in just ten minutes flat. Crispy seabass with preserved lemon yogurt is that perfect balance of impressive and effortless, with tangy Greek yogurt and zingy preserved lemon creating a sauce that feels restaurant quality but tastes like home. The seabass gets beautifully golden and flaky while the freekeh provides substantial whole grains packed with fiber and protein. It's the kind of meal that makes you feel like you're treating yourself without any fuss.

Beergarita
My go to drink for summer gatherings is this refreshing Beergarita, and let me tell you, it's a total crowd pleaser. The combination of tequila, triple sec, fresh lime juice, and a cold Corona creates something that tastes way more complicated than it actually is. Lime juice is packed with vitamin C, which is great for your immune system, and the whole thing takes just five minutes to throw together. Best part? It's incredibly budget friendly since you're probably already stocking most of these ingredients anyway.

Yuzu Collins
Have you tried a Yuzu Collins? This is my go to drink when I want something refreshing that comes together in just five minutes. The yuzu juice adds this beautiful citrus brightness that feels fancy but honestly couldn't be easier to make. I love that yuzu is packed with vitamin C, so you're basically getting a little immune boost while you enjoy your cocktail. It's the kind of drink that impresses friends without requiring any special bartending skills, perfect for a casual evening at home.
Reviews
Sign in to write a review.