First, preheat your oven to 375°F (190°C). While it's heating up, prepare the chicken. Remove it from its packaging and take out any giblets from the cavity. Rinse the chicken thoroughly, inside and out, with cold water, and then pat it completely dry with paper towels. This step is crucial for achieving crispy skin.
Cut one of the lemons in half. Squeeze the juice from both halves all over the chicken, making sure to cover the entire surface and the inside of the cavity. Next, place the squeezed lemon halves and the whole garlic cloves inside the chicken. This will create steam and infuse the meat with flavor as it cooks.
In a small bowl, combine the dried thyme, rosemary, and parsley. Add a generous amount of salt and pepper and mix well. Rub this herb mixture all over the outside of the chicken. Gently lift the skin over the breast and thighs and push some of the rub underneath to season the meat directly.
Drizzle the olive oil over the seasoned chicken. Cut the second lemon into thick slices and arrange them around the chicken in the roasting pan. Place the pan in the preheated oven and roast for about 1 hour and 30 minutes. The chicken is done when the juices run clear and an instant-read thermometer inserted into the thickest part of the thigh reads 165°F (74°C).
Once cooked, remove the chicken from the oven. Let it rest in the pan for 10-15 minutes before carving. This allows the juices to redistribute throughout the meat, ensuring every slice is moist and tender. Carve the chicken and serve it immediately with your favorite side dishes.