Trim extra fat off chicken thighs and then place in bowl. Add olive oil, lemon juice & zest, garlic, salt, pepper, and oregano. Mix until well coated. Let marinate at least 30 minutes or up to 8 hours.
Preheat oven to 400F. Line baking sheet with parchment paper.
Cut potatoes in cubes. Add them to a bowl and toss with olive oil, salt, pepper, and oregano. Pour onto baking sheet and bake for 10 minutes.
While potatoes are baking, cut green beans into bite sized pieces. Add to bowl potatoes were in and toss with olive oil, salt, pepper, and oregano.
After potatoes have cooked for 10 minutes, take out of oven and add green beans. Mix until evenly spread, then add chicken thighs to pan, nestling thighs into the potatoes.
Bake for 18 minutes and then broil for 5-6 minutes or until everything starts to brown and get crispy.
Place the chicken, potatoes, and green beans on a platter and sprinkle with fresh dill, feta, a little bit of salt and pepper. Then squeeze fresh lemon juice on top. Enjoy!