Mix sugar and gelatin in a saucepan, add 1/2 cup of wine and leave for 5-10 minutes.
Cut the bananas into slices and put them in cupcake molds.
Add the rest of the wine, stir and bring to a boil over low heat. Cook for 1-2 minutes on low heat, stirring constantly (until the sugar and gelatin completely dissolve). Remove from heat and cool slightly (5 minutes).
Add lemon juice to the wine-sugar mass, mix and pour over the bananas. Put in the refrigerator until completely solidified.
Lower the jelly molds (bottom) into hot water for a few seconds and turn the jelly onto a plate.