Make it at least one day ahead. It thickens in the refrigerator and the flavor rounds out overnight.
Pull the pan off the heat while the sauce still looks too loose. It firms up considerably as it cools, and cooking to a thick consistency in the pan gives a stiff, overcooked sauce.
No pectin, gelatin or cornstarch needed. Cranberries carry more than enough natural pectin.
For jellied sauce, use all the berries at once, simmer until every one bursts, then press through a fine-mesh sieve, pour into a mold and chill until firm.
Frozen cranberries work exactly as well as fresh. Do not thaw them, just add a minute or two to the simmer.
Resist adding more sugar. The acidity and faint bitterness are the whole point against rich meat.
Serve cold or at room temperature alongside roast turkey, stuffing, mashed potatoes and gravy, or roast ham. Spread the leftovers on a turkey sandwich the next day.
Keeps 2 weeks covered in the refrigerator and freezes for 3 months.
For the oldest Acadian version, swap the granulated sugar for 3/4 cup pure maple syrup and cut the water to 3/4 cup.