*For the brining container my secret weapon is a Giant Ziploc Bag. You can also use a clean 5 gallon bucket or a giant stockpot that your turkey can fit into. You want the liquid to cover the entire turkey.
Heat broth, salt, peppecorns, rosemary, and garlic in a large stockpot. Bring to a simmer. Remove from heat and let cool completely.
Place turkey in plastic bag, 5 gallon bucket, or clean large stockpot. Pour cooled brine solution over turkey to cover. Refrigerate 24 hours.