In a bowl, combine olive oil, minced garlic, lemon juice, dried oregano, dried thyme, salt, and black pepper. Coat the sirloin steak thoroughly, then marinate for at least 30 minutes.

Mix together Greek yogurt, grated cucumber, minced garlic, lemon juice, and honey in a separate bowl. Cover and refrigerate for about 20 minutes.

In a small bowl, whisk together olive oil, lemon juice, and a pinch of salt and pepper to make a vinaigrette. Set aside.

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

In a large serving bowl, start with a base of cooked grains, layer sliced steak on top, and arrange fresh veggies and feta cheese around.

Drizzle the tzatziki sauce and vinaigrette over the bowl to enhance flavors.