In a bowl, combine 2 tablespoons of olive oil, oregano, garlic powder, salt, and pepper. Add the flank steak and coat evenly.
Preheat your grill to medium-high heat.
Grill the steak for 5-7 minutes per side for medium-rare, or until desired doneness. Let it rest for 10 minutes before slicing against the grain.
Cook the Quinoa
In a saucepan, combine the rinsed quinoa and 2 cups of water. Bring to a boil, then reduce heat, cover, and simmer for 15 minutes, or until water is absorbed.
Fluff with a fork and set aside.
Make the Dressing
In a small bowl, whisk together 1/4 cup olive oil, lemon juice, dill, garlic powder, salt, and pepper until well combined.
Assemble the Bowls
Divide the cooked quinoa among 4 bowls.
Top each bowl with sliced steak, diced cucumber, halved cherry tomatoes, sliced red onion, and Kalamata olives.
Drizzle with the lemon-herb dressing and sprinkle with fresh parsley and crumbled feta cheese.
Notes
For an extra touch, you can add a dollop of tzatziki sauce to each bowl.