Preheat the oven to 400°F.
Add the olive oil, citrus juice, chopped herbs, salt, and pepper to a bowl and whisk until well combined. Add the chicken breasts and toss inthe marinade until well coated. Cover and refrigerate for 15-20 minutes.
Meanwhile, heat salted water in a pot until boiling. Add the potatoes and let them boil for 4-5 minutes.
Drain the potatoes and let them air dry. Cut them into quarters and then toss in the olive oil, salt, and pepper. Add the potatoes to a large (9 x 13 inch) baking dish and roast for 20-22 minutes.
While the potatoes are cooking, sear the chicken breasts on a hot skillet for 3-4 minutes on each side.
Remove the potatoes from the oven and add the chicken breasts to the baking dish. Add the lemon/orange slices on top and place the dish back in the oven for 8 minutes.
Serve the chicken and potatoes with a squeeze of lemon and enjoy!