Preparation: Preheat your oven to 400°F (200°C). Lightly grease a large 9x13 inch glass baking dish or a large rimmed sheet pan.
Season the Veggies: In a large mixing bowl, toss the halved potatoes, carrots, and green beans with 2 tablespoons of olive oil, half of the minced garlic, salt, and pepper.
Arrange: Spread the vegetables into the baking dish, leaving space on one side for the chicken. Make sure the potatoes are flat-side down to get that perfect golden roast.
Season the Chicken: In the same bowl (no need to wash!), toss the chicken medallions with the remaining 1 tablespoon of oil, the rest of the garlic, smoked paprika, and dried herbs. Rub the spices in until the chicken is vibrant and evenly coated.
Assemble: Nestle the chicken pieces into the baking dish next to the vegetables.
Oven Roast: Bake for 25–30 minutes. The chicken should be juicy and opaque throughout (165°F internal), and the potatoes should be fork-tender with a golden edge.
Serve: Remove from the oven and garnish immediately with a generous shower of fresh parsley. Serve hot, drizzling any pan juices back over the chicken.