It's not for everyone, but it's a Petersen family favorite.
(Jessie and I have been known to make it for ourselves, since no one else wanted to partake!)
1 can pineapple, drained (reserve juice)
1 heaping T. flour
1 T. sugar
dash of salt
1 egg or 2 egg yolks
1 T. lemon juice
Stir together reserved pineapple juice, flour, sugar, salt, and egg. Cook and stir until thickened.
Add lemon juice.
Pour hot sauce over marshmallows and pineapple. Chill, stirring occasionally.
Top with grated sharp cheddar.