Three Berry Marmalade with Tangelo Zest and Juice

Marmalade is so easy to make. It can be flavored with anything, and it's so delicious. This time berries were used. Strawberries, blueberries and blackberries were put in a pot, along with sugar in the raw, lemon juice, tangelo juice and zest, vanilla extract, a cinnamon stick and a hint of sherry. Bring it all to a boil, cook for 10 minutes, then cool. Simple.