Secure meat using spiked board or roasting pan with high sides. Position clear plastic wrap over chicken in a single layer. Fill bellows with vinagrette. Using large needle, inject the chicken in the breast, thigh and leg section. Place most of the marinade in the breast. Allow the meat to marinate in the refrigerator for about 30 minutes. Remove plastic wrap and roast, breast side up in a 325 degree F. oven for about 20-30 minutes per pound or until done. (Meat thermometer reads 180 - 185 degrees inserted in the thickest part of the thigh.)