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Garlic mushroom and halloumi skillet garnished with fresh parsley in a cast iron pan

Garlic Mushroom & Halloumi Skillet

Garlic Mushroom & Halloumi Skillet brings golden-crusted halloumi together with caramelized mushrooms in this rich, satisfying vegetarian skillet that delivers serious protein without the meat. Each bite combines squeaky, salty cheese with umami-packed mushrooms and aromatic garlic in a quick balsamic pan sauce. Ready in just 30 minutes, this is weeknight vegetarian cooking at its finest. Searing the mushrooms undisturbed in a single, uncrowded layer is what allows genuine caramelization to develop rather than the pale, steamed result overcrowded mushrooms produce when their released moisture has nowhere to escape. Halloumi is cooked entirely separately from the mushrooms, since its firm structure and high melting point need direct, undisturbed contact with the pan to build a deeply golden crust of its own — combining the two too early would prevent either from developing properly. The garlic butter sauce is built last, directly in the same pan, capturing all the flavor left behind from both the mushrooms and the halloumi before the components are gently reunited at the very end. The result is a dish that's genuinely substantial, deeply savory, and remarkably quick for how much flavor it delivers.
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Prep Time 15 minutes
Cook Time 15 minutes
Total Time 30 minutes
Servings: 4
Course: Main Course
Cuisine: Mediterranean
Calories: 380
Ingredients Method Notes

Ingredients
  

For the Halloumi
  • 500 g halloumi cheese sliced 1cm thick
  • 30 ml olive oil
For the Mushrooms
  • 450 g mixed mushrooms cremini, shiitake, oyster, sliced
  • 30 ml olive oil
  • 2.5 g fine sea salt
  • 2 g freshly ground black pepper
For the Garlic Sauce
  • 40 g unsalted butter
  • 8 garlic cloves thinly sliced
  • 30 ml balsamic vinegar
  • 10 g fresh thyme leaves
  • 3 g red pepper flakes
  • 2.5 g fine sea salt
  • 2 g freshly ground black pepper
For Garnish
  • 30 g fresh parsley chopped

Method
 

Sear the Mushrooms
  1. Heat 30ml olive oil in a large skillet over high heat until shimmering. Add the 450g sliced mushrooms in a single layer without crowding the pan. Let them cook undisturbed for 4 minutes until a deep golden-brown crust forms on the bottom. Stir and continue cooking for another 3 minutes until golden all over. Season with 2.5g salt and 2g black pepper, then transfer to a plate.
Cook the Halloumi
  1. Add the remaining 30ml olive oil to the same skillet and reduce heat to medium-high. Arrange the 500g halloumi slices in a single layer. Cook for 2 minutes per side without moving until each side develops a deeply golden, crispy crust. Transfer to the plate with the mushrooms.
Make the Garlic Sauce
  1. Reduce heat to medium and add 40g butter to the pan. Once melted, add the 8 sliced garlic cloves and cook for 1 minute, stirring constantly, until fragrant and just golden but not burned.
Build the Pan Sauce
  1. Add 30ml balsamic vinegar, 10g thyme leaves, and 3g red pepper flakes to the garlic butter. Let the mixture simmer for 30 seconds, swirling the pan to combine the flavors and slightly reduce the sauce.
Combine and Serve
  1. Return the mushrooms and halloumi to the skillet. Toss gently to coat everything with the garlic-balsamic sauce, being careful not to break up the halloumi slices. Garnish with 30g chopped fresh parsley and serve immediately while the halloumi is still hot and tender.

Notes

Searing the mushrooms in a single, uncrowded layer is what allows genuine caramelization rather than steaming. Mushrooms release a significant amount of moisture as they cook, and if too many are packed into the pan at once, that moisture has nowhere to escape, trapping the mushrooms in their own steam instead of letting them brown properly.
Cooking the halloumi entirely separately from the mushrooms, rather than together in one pass, respects each ingredient's distinct cooking needs. Halloumi's firm, high-melting-point structure needs direct, undisturbed pan contact to develop its own deeply golden crust — cooking it alongside the mushrooms would crowd the pan and prevent either component from browning as it should.
Building the garlic sauce last, directly in the same pan used for both the mushrooms and halloumi, means the sauce picks up all the residual flavor left behind by both components. Watching the garlic closely during this stage matters — thinly sliced garlic can go from golden and fragrant to burnt and bitter within seconds.