Prepare the Chicken: Rinse the chicken and pat dry. Stuff the cavity with the lemon half, rosemary, thyme, sage, and garlic.
Season the Chicken: In a small bowl, mix the melted butter with Uncle Dibbz Durtty Bird Rub. Apply the mixture evenly over the chicken.
Prepare the Vegetables: In a bowl, toss the halved potatoes, carrots, and onion with olive oil. Sprinkle with Uncle Dibbz Delta Dust, tossing again to coat evenly.
Prepare the Oven Bag: Add flour to the oven bag and shake to coat the inside. Place the seasoned vegetables in the bag, then add the chicken on top. Seal the bag and make a few small slits on top.
Roast: Place the bag in a roasting pan and bake in a preheated oven at 350°F for about 1.5-2 hours, or until the chicken reaches an internal temperature of 165°F.
Finish and Serve: Allow the chicken to rest before serving. Garnish with fresh parsley for a pop of color.