How to make Jelly Flan or Lechetin with whole eggs

Ingredients: For caramelized sugar: 1 cup granulated sugar For the leche flan: 5 large whole eggs 1 can big condensed milk 1 can big evaporated milk 1 tbsp vanilla extract 1 tbsp lemon juice Pinch of lemon zest For the gelatin: 1 sachet unflavored gelatin powder (yellow) 4 cups water(room temperature) 1/2 cup white sugar