2 tablespoons finely chopped shallots or green onion
1 tablespoon brandy, optional
1/4 cup half-and-half
1 tablespoon fresh lemon juice
2 teaspoons Dijon-style mustard
2 teaspoons Worcestershire sauce
Heat oil in large nonstick skillet over medium heat until hot. Add mushrooms and shallots; cook and stir 3 minutes or until tender. Remove.
Wipe skillet out with paper towels; spray with cooking spray. Heat over medium heat until hot. Combine lemon peel and pepper; press onto steaks. Place steaks in skillet; cook 12 to 15 minutes for medium rare to medium doneness, turning occasionally. Remove; keep warm.
Add brandy to skillet; cook and stir until browned bits attached to skillet are dissolved. Stir in half-and-half, lemon juice, mustard and Worcestershire sauce. Stir in mushroom mixture; heat through. Carve steaks. Serve with sauce.