This recipe is one of the hallmarks of my childhood. :) I believe it was my great grandmother's recipe on my Dad's side, and whenever a holiday came along the lemon mallobet wasn't far behind. It takes a bit of time and effort to prepare, but for a family celebration it was always worth it. I loooove this stuff. :)
I know my great grandmother always used to make the recipe as is and fill ice cube trays with the mallobet to freeze. My mom always used to double the recipe and use a jello mold or a bundt pan for the main mixture. (I'd recommend doing the latter ;) )
Edit: To address some of the questions in Chef #799733's comment, the jelled mixture doesn't mix 100% with the egg whites. The trick to an even texture is to break up the jell fairly thoroughly before folding in the egg whites. The first few times I made this after my mom passed down the recipe I didn't mix it up well enough and it tended to have some odd inconsistencies in the texture.
It's been a couple of years since I had the time to make this myself so I don't remember how long it takes for the sauce to thicken. The consistency changes from fairly thin to more like a cream soup or chowder before it's done.
Also, the red and green decorations in the photo were done by sprinkling some cake/cookie decorations in the bottom of the bundt pan before I poured the mixture in. I also put some green food coloring on a long teaspoon and slid it down the outside edge of the bundt pan after I poured the mallobet into the bundt pan, just before I froze it. I hope this clears things up a bit. And I apologize for not responding directly. I don't have a premium membership :)