01 - Preheat the oven to 425°F.
02 - Pat the chicken dry with paper towels. Rub the outside with 2 tbsp olive oil, salt, and pepper. Stuff the cavity with lemon halves, garlic cloves, rosemary, and thyme.
03 - Place the chicken breast-side up in a large roasting pan or oven-proof skillet.
04 - In a bowl, toss potatoes, carrots, and radishes with 1 tbsp olive oil, salt, and pepper. Arrange them around the chicken in the pan.
05 - Roast for 50 minutes, basting the chicken once or twice with pan juices.
06 - After 50 minutes, add snap peas and asparagus around the chicken. Continue roasting for 20 minutes, or until the chicken's juices run clear and a thermometer inserted into the thickest part of the thigh reads 165°F.
07 - Remove the chicken from the oven. Let it rest for 10 minutes before carving.
08 - Arrange the carved chicken on a platter with the roasted vegetables. Garnish with parsley and lemon zest. Serve immediately.