Preheat your oven to 425°F and prepare a large roasting pan with a light coating of olive oil. Pat your chicken completely dry inside and out using paper towels—moisture is the enemy of crispy skin. This prep work takes just five minutes but makes a dramatic difference.
Create your herb paste by combining minced garlic, 2 tbsp olive oil, thyme, rosemary, paprika, salt, and pepper in a small bowl. Rub this mixture all over the chicken, under the skin, and inside the cavity for maximum flavor distribution. Don't be shy—the herbs should coat every surface generously.
Stuff the chicken cavity with 2 whole lemons cut in half and your quartered onion. Arrange your potatoes, carrots, and remaining lemon halves around the chicken in the roasting pan. Pour chicken broth into the bottom of the pan to keep everything moist during cooking.
Place your cozy lemon roast chicken recipe in the preheated oven and roast for 1 hour and 15 minutes, or until the internal temperature reaches 165°F at the thickest part of the thigh. Baste the bird with pan juices halfway through cooking for extra moisture and even browning.
Remove from the oven and let it rest for 10 minutes before carving—this allows the juices to redistribute, keeping the meat incredibly tender. While resting, dot the vegetables with butter and sprinkle fresh parsley over everything for added elegance.
Transfer the roasted chicken to a serving platter and arrange the caramelized vegetables around it. Drizzle the pan drippings over the top for a glossy, restaurant-quality presentation. Squeeze additional fresh lemon juice from a wedge over the finished dish if desired.