In a bowl, combine olive oil, minced garlic, lemon juice, dried oregano, thyme, salt, and black pepper to create a marinade for the steak. Let it marinate for at least 30 minutes.

Prepare the tzatziki by mixing Greek yogurt, grated cucumber, garlic, fresh herbs, lemon juice, salt, and pepper. Chill until ready to use.

Whisk together the vinaigrette ingredients until well combined. Set aside.

Preheat a skillet over medium-high heat. Sear the marinated steak for 4-5 minutes on each side until desired doneness. Let rest and then slice.

Layer cooked grains in bowls, top with sliced steak, cherry tomatoes, cucumber, red onion, Kalamata olives, and feta. Drizzle with vinaigrette and add tzatziki.

Garnish with chopped parsley or dill and serve immediately.