01 - Preheat the oven to 425°F.
02 - Rub the chicken thoroughly with olive oil, salt, and pepper. Stuff the cavity with lemon halves, smashed garlic cloves, thyme sprigs, and rosemary sprigs.
03 - Tie the legs together securely with kitchen twine and tuck the wings under the body. Place the chicken breast-side up in a large roasting pan.
04 - In a large bowl, toss baby potatoes and carrots with 1 tablespoon olive oil, salt, and pepper until evenly coated. Arrange them around the chicken in the roasting pan.
05 - Roast the chicken with potatoes and carrots for 35 minutes.
06 - Toss asparagus, sugar snap peas, and radishes with a little olive oil, salt, and pepper. After 35 minutes, add these vegetables to the roasting pan around the chicken.
07 - Continue roasting for another 20 minutes, or until the chicken is golden brown and the juices run clear when pierced. The internal temperature should reach 165°F when measured in the thickest part of the thigh.
08 - Transfer the chicken to a cutting board and let it rest for 10 minutes before carving to allow juices to redistribute.
09 - Arrange the roasted vegetables on a serving platter. Carve the chicken and place on top of the vegetables. Sprinkle with fresh parsley and lemon zest just before serving.