Place all ingredients in a medium saucepan, mix, and bring to a simmer over medium heat.
Reduce heat to low, cover with a lid, and gently simmer, stirring frequently, for 45-60 minutes. Keep covered while simmering, leaving only a little crack for the steam to escape. Make sure it simmers gently. Stir from time to time.
Transfer into a blender and puree until smooth.
Let cool completely and transfer to a medium jar. Once completely cooled, close with a lid tight and refrigerate.
Without canning process, this jam will last about 6 weeks in the refrigerator.