For the dressing, combine ingredients in a shaker or whisk in a bowl. Shake well to mix. Taste and adjust salt to your liking. Shake before drizzling.
For the steak, cube steak into 3/4-inch cubes. Toss with steak steasoning and 1 tablespoon olive oil.
In a large cast iron skillet, heat over medium-high heat. Add second talbespoon of oil and once shimmering hot, add steak in a single layer. Cook for 3-4 minutes to get a good sear on one side of the steak.
Stir steak and cook until browned on all sides. Steak should be medium in the center after 3-4 more minutes of cooking.
Add butter to skillet and toss steak with metled butter. Remove from heat and garnish with parsley (optional).
Assembling Bowls:
In a large serving bowl, combine a cup of greens with 1/2 cup of brown rice. Toss to combine. Drizzle in a tablespoon of dressing and toss.
Top greens and rice with chopped vegetables, a scoop of hummus, feta cheese, and steak.
Drizzle more dressing on top and serve immediately.