In a bowl, combine olive oil, lemon juice, salt, pepper, and minced garlic. Add steak and coat well. Let marinate at room temperature for 30 minutes.

Preheat grill or skillet over medium-high heat. Cook steak for about 4-5 minutes per side for medium-rare (130°F/54°C). Let it rest before slicing thinly against the grain.

While steak cooks, mix cherry tomatoes, cucumber, red onion, olive oil, lemon juice, and herbs in a bowl.

In serving bowls, layer greens if desired; add the veggie mixture followed by sliced steak and crumbled feta.

Finish with an extra drizzle of olive oil and lemon juice before enjoying.