The pineapple tomatillo (ie. ground cherry)- they grow much like a regular tomatillo in that they form lantern husks with the fruit inside. They’re about the size of a cherry tomato and taste sweet, much like pineapple.
Vanilla is a dominant flavor in this jam, that meshes perfectly with the sweet tang of the black plums. The fresh Mint assists in a slight menthol cooling effect, but doesn’t overpower the flavor palate.