To Make The Marinade:

1. Add all marinade ingredients to a bowl and whisk to combine. Pour marinade into a large bowl or ziplock bag, then add in the steak and gently toss to combine. Cover/seal and refrigerate for at least 15 minutes.

To Make The Stir-Fry

1. Once beef stir fry has marinated, heat 1 Tbsp. oil in a large saute pan over medium-high heat.
2. Remove beef stir fry from marinade with a slotted spoon, reserving the marinade, and add to saute pan with garlic.
3. Saute for about 2-3 minutes until browned, stirring occasionally. Remove beef stir fry with a slotted spoon and set aside.
4. Add mushrooms, kale, and reserved marinade to saute pan, and stir to combine. Cook for 3-4 minutes, until the kale is wilted, the sauce has thickened, and the mushrooms have cooked, stirring regularly so that sauce does not burn.
5. Add in the beef stir fry, and toss to combine.
6. Serve immediately over rice or quinoa garnished with chopped green onions.