Whisk together all marinade ingredients.
Add steak tips. Toss to coat.
Marinate for 10 minutes at room temperature or up to 4 hours refrigerated.
Heat large skillet over high heat until very hot.
Remove steak from marinade. Reserve marinade.
Add butter to pan. Let melt.
Add steak tips in single layer. Do not overcrowd.
Sear 2 to 3 minutes without moving.
Flip. Cook 2 to 3 minutes more for medium.
Transfer to plate. Cover with foil.
Pour reserved marinade into pan. Boil 2 minutes.
Return steak to pan. Toss in sauce.
Season with salt. Garnish with parsley. Serve hot.