Hi there, I've just cooked the Good Housekeeping winter veg casserole, and on the recipe it said to add cream before serving. I used milk instead of cream as I didn't have any, and forgot the 'before serving' bit, so my entire casserole has it in, and it's several night's worth (was going to freeze some maybe). Have I ruined it? Worried the milk is going to go off in my casserole?