In a mixing bowl, combine olive oil, garlic, lemon juice, oregano, thyme, salt, and pepper. Add the steak, cover, and refrigerate for at least 30 minutes.

Mix Greek yogurt, grated cucumber, minced garlic, dill, and a pinch of salt in a bowl to create the tzatziki. Chill in the fridge for at least 15 minutes.

Whisk olive oil, lemon juice, salt, and pepper in a small bowl to create the vinaigrette. Set aside.

Heat a skillet over medium-high heat. Sear the marinated steak for 4-5 minutes on each side. Let it rest for 5 minutes before slicing.

Warm cooked grains in the microwave or stovetop and layer them in serving bowls.

Layer sliced steak on grains, add toppings like tomatoes, cucumber, onion, olives, and feta. Drizzle with tzatziki and vinaigrette, finishing with fresh herbs.

Serve immediately with pita bread or salad if desired.