1. Preheat oven to 350°.
2. Combine mustard, 1 teaspoon herbs, 1/4 teaspoon pepper, and garlic, and coat beef with mixture. Heat a large ovenproof skillet coated with cooking spray over medium-high heat. Add beef; cook for 2 minutes on 1 side or until browned. Turn beef over.
3. Transfer beef to oven; bake at 350° for 27 minutes or until desired degree of doneness. Remove beef from pan; cover loosely with foil.
4. Melt butter in pan over medium heat. Add mushrooms, 1/4 teaspoon herbs, 1/4 teaspoon pepper, and salt; cook 5 minutes or until tender, stirring frequently. Add broth and brandy; simmer 4 minutes or until slightly thick.
5. Cut beef crosswise into 8 pieces; serve with mushrooms.