-6 ripe bananas
-2 cups sugar
-1/2 cup fresh lemon juice
-1 tablespoon grated lemon zest
Slice the bananas round. In a large bowl, stir together the sugar, lemon juice, and lemon zest until sugar is dissolved. Fold in the banana slices until their all evenly coated. Cover the bowl with plastic wrap or aluminum foil to let the bananas marinate at room temperature for at least an hour.
Put the bananas and marinade in a saucepan. Bring it to a boil, stirring frequently so you do not burn the sugar. Reduce the heat to low and let simmer uncovered for about 30 minutes, stirring occasionally. The jam should be thick enough to mold with a spoon if that helps clarify when it's done. Immediately ladle the jam into an airtight container and refrigerate.