Lemon Barbecued Chicken

2 chicken breasts
¾ tsp salt
½ tsp grated lemon rind
1 tsp Worcestershire sauce
¼ tsp dry mustard
¼ tsp dried oregano
¼ cup vegetable oil
¼ cup lemon juice
1 T chopped green onion

Place chicken breasts in a large zip-top freezer bag.  Combine salt and next 4 ingredients in a small bowl.  Gradually add oil and lemon juice, stirring well.  Stir in green onion.  Pour over chicken; seal bag.  Marinate in refrigerator 3 hours, turning occasionally.
Remove chicken from marinade, reserving marinade.  Place marinade in a small saucepan.  Bring to a boil; set aside.
Grill by your favorite method, basting with reserved marinade and turning once.