Cut plums in half, remove pit, then cut each half into quarters.
Add plums to a medium-sized saucepan and set stove to low-medium heat (level 3). Add remaining ingredients to saucepan and cover to bring to a gentle simmer. Cook for about 25 minutes, decrease temperature to Lo for about 10 minutes. Let sit on stove cover to let cool slightly before transferring to a glass jar.
Store jam in fridge for about a week or freeze immediately. I like to store the jam in 8 oz. jars so I don't have too much sitting in the fridge at a time.
Keyword homemade jam, plum jam, recipes with chia seeds, recipes with plums