METHOD 1: Refrigerator/Freezer Storage (No Water Bath)
Prepare jars: Wash jars and lids in hot, soapy water or run through the dishwasher. Set aside.
Cook the jelly: In a large pot, combine wine, chili flakes and rosemary. Put over high heat and bring into a boil. Add lemon juice and cook for 1-2 minutes. Gradually add the pectin, stirring frequently.
Gradually add sugar: Stir until completely dissolved. Remove the rosemary sprig.
Boil: Bring to a full rolling boil (one that cannot be stirred down). Boil for exactly 1 minute, stirring constantly.
Jar: Remove from heat. Ladle into clean jars, leaving 1-inch headspace.
Cool and store: Tighten lids and let sit at room temperature until completely cooled and set (several hours or overnight). Refrigerate for up to 3 weeks or freeze for up to 1 year.