Start by slicing the chicken breasts in half horizontally to create thinner cutlets. This ensures quick, even cooking. You can also tenderize the pieces with a mallet if you prefer ultra-soft chicken. Season both sides generously with salt and pepper.
Heat olive oil in your skillet over medium-high heat. Once hot, add the chicken cutlets. Sear each side for about 4-5 minutes until golden brown and cooked through. Remove the chicken and set it aside on a plate.
Lower the heat slightly and melt the butter in the same skillet. Toss in the sliced mushrooms and stir occasionally. Cook them for 5-7 minutes until golden and tender. Adding a pinch of salt will help the mushrooms release their moisture.
Step 4: Create the Sauce
To the skillet, add garlic and sauté for about 30 seconds until fragrant. Pour in the chicken broth, stir in lemon juice, Dijon mustard, and Italian seasoning. Reduce the liquid by half (about 3-4 minutes). Finally, whisk in the heavy cream to create a velvety sauce.
Return the chicken and its juices to the skillet, nestling the pieces in the sauce. Allow it to simmer for another 5 minutes so the flavors meld and the chicken is fully warmed through.
Transfer the chicken and mushrooms to plates, spooning the creamy sauce generously over the top. Garnish with parsley for an inviting touch.