Making a Mediterranean Steak Bowl involves a few simple steps that will guide you through the process:

1. Marinate the Steak: In a bowl, combine olive oil, lemon juice, minced garlic, oregano, salt, and pepper. Add the flank steak, ensuring it is well coated. Cover and let marinate for at least 30 minutes or overnight for maximum flavor.

2. Preheat the Grill or Pan: Heat your grill or a skillet over medium-high heat.

3. Cook the Steak: Remove the steak from the marinade and cook on the grill or skillet for about 5-7 minutes on each side for medium-rare, or longer if preferred. Use a meat thermometer to check for doneness (135°F for medium-rare).

4. Rest the Steak: Once cooked to your liking, remove the steak from the heat and let it rest for about 5 minutes. This allows the juices to redistribute, ensuring a tender bite.

5. Prepare the Salad Base: While the steak is resting, assemble the mixed greens in a large bowl or individual serving bowls.

6. Add Toppings: Top the greens with halved cherry tomatoes, diced cucumber, sliced red onion, feta cheese, and Kalamata olives.

7. Slice the Steak: After resting, slice the steak against the grain into thin strips.

8. Assemble the Bowl: Arrange the sliced steak on top of the salad base. Drizzle tzatziki sauce on top for added flavor.

9. Serve: Enjoy your Mediterranean Steak Bowl immediately, garnished with extra feta and olives if desired.