Preheat oven to 450 degrees.
Marinate chicken breasts by mixing together olive oil, lemon juice, garlic, oregano, salt and pepper and letting sit in a plastic bag with chicken for 10 minutes.
Cook chicken in the oven for 20 minutes in an oven safe dish. Remove from oven and cut into 1-inch cubes once cooled a bit. Chicken can be made up to a day or two in advance so all you have to do is make the fries fresh and top them with chicken and veggies.
While chicken is marinating/baking, wash potatoes and cut them into relatively thin (about 1/2 inch thick) fries using a sharp knife or mandolin.
Soak fries in water and rinse away starch, then dry with a clean towel and place into large bowl. Toss fries with olive oil, chili powder, oregano, parsley and salt and place on oven sheet. Cook in oven for 12 minutes each side, flipping fries once.
While fries are cooking, start prepping your toppings.
Top Greek fries with chicken, your favourite toppings, sprinkle with your fave herbs and spices, then finish with tzatziki/hummus. Serve and enjoy!