Step 1

Season chicken with salt and pepper. Heat a large straight-sided skillet over medium-high; swirl in 2 tablespoons oil. Add chicken and cook until golden brown, 2 to 3 minutes a side; transfer to a plate. Add mushrooms to skillet, season, and cook, stirring, until beginning to brown, about 7 minutes. Add shallots and remaining 1 tablespoon oil; cook until translucent, 1 to 2 minutes.

Step 2

Stir in mustard, broth, and noodles; bring to a boil, then cover, reduce heat to medium, and simmer 3 minutes. Uncover; stir in cream cheese. Cook, stirring, until noodles are tender and sauce coats a spoon, about 3 minutes. Return chicken to skillet and cook through, about 1 minute more. Serve, sprinkled with parsley.