I would make a white sauce, divided into many portions, and freeze it. Then you can use it whenever to make cheese sauce, tetrazzini, etc. Or just make lots and lots of cheese sauce and freeze that, or just freeze the milk.
@shh, good memory, but I started with sweetened condensed milk and cooked it in the crock pot to turn it into dulce de leche. If you start with milk, I'd guess you need to cook it down with sugar to first get to the sweetened condensed stage, but I've never tried that.
I am no longer in the mood for chowder (given the spring weather)...any other suggestions?
Pudding?