*Chip uses Guidry’s Creole Seasoning®, a pre-chopped mixture of seasoning vegetables, but if you can’t find it, you can always substitute 1 cup chopped onions, ½ cup chopped celery, ½ cup chopped bell pepper, and ¼ cup chopped garlic.
Chip suggests a feeding syringe for getting the seasoning mixture into the breast (check at medical or farm supply stores). A pastry bag would work in a pinch, though.