TIP First cover the strata with plastic wrap, then add a small pan (or a couple of small plates), and heavy cans as weights.
Think of the Leek, Herb, and Havarti Strata recipe as less a prescription you should follow to the letter than a formula you can use to make your own recipe. Don’t love havarti? Use cheddar or fontina or Gouda or jack or any other good melting cheese. No leeks in the house? Try chard, onions, or another vegetable. Or combine a vegetable and meat.