Sprinkle steaks with steak seasoning. In a large skillet, heat butter over medium heat. Add steaks; cook until meat reaches desired doneness, 4-5 minutes on each side. Remove steaks from pan.
Add mushrooms to skillet; cook and stir over medium-high heat until tender. Add broth, stirring to loosen browned bits from pan. Stir in cream, steak sauce and garlic salt. Bring to a boil; cook and stir until sauce is slightly thickened, 1-2 minutes.
Return steaks to pan; turn to coat and heat through. Stir in chives.