Pat chicken thighs dry with paper towel and trim off excess fat. Season the chicken thighs with lemon juice salt. Let it absorb the lemon juice for 15 minutes.
Combine the garlic cloves, thyme, rosemary, and pepper.
Coat the chicken evenly with the combined seasoning.
Heat 1 tablespoon of oil a large pan or skillet over medium-high heat and sear chicken thighs in batches until browned on each side and no longer pink in centre (about 8 minutes each side, depending on thickness).
Transfer to a plate; set aside and keep warm.
Creamy Mushrooms Sauce
On the same pan or skillet, put the olive oil and add the mushrooms. Season with salt and pepper and cook until soft (about 3 minutes).
Add the garlic, parsley, thyme and rosemary; sauté until fragrant (about 1 minute).
Stir in heavy cream, bring to a simmer, then reduce heat and continue cooking until sauce has thickened slightly. Add nutmeg. Stir in the parmesan cheese and allow it to melt through the sauce for a further 4 minutes, while occasionally stirring.
Return chicken to the pan. Taste test and season with salt and pepper to your taste. Garnish with fresh parsley and parmesan cheese. Serve immediately.