Chicken Breasts with Easy Mushroom Pan Sauce. This easy to prepare chicken comes together in a flash with our easy sear technique! Ingredients: 4 chicken breasts, 2 tablespoons canola oil or extra light olive oil extra virgin will work in a pinch but has a lower smoke point, salt and pepper, 1 tablespoon butter, 8 oz cremini mushrooms sliced, 3 cloves large garlic chopped, 2 tablespoon white flour, 1 cup chicken stock, additional salt and pepper to taste. Method. Heat large non stick or cast iron skillet to medium high. Rub chicken with oil and sprinkle liberally with salt and pepper.