The academy of nutrition and dietetics provides the following advice for preventing cross-contamination of food while grilling it. Firstly, it goes without saying that the grill should be clean and free of any leftovers. Do not use the same plate for raw food and the grilled food, wash it first or use a different one. Same goes for grilling utensils. Lastly, never use marinade that contained raw meat for basting cooked meat. Happy Cooking!