and cheese, with salt and pepper for seasoning. That said, you can adjust within that framework. Swap the mild cheddar for Colby or a young Swiss for a slightly different but still period-appropriate flavor. If you prefer a milder onion note, grate the onion instead of mincing so it almost melts into the cream, or reduce the amount by half.
For a lighter version, you can use half-and-half instead of heavy cream, but the cups may weep a bit more liquid and won’t be quite as rich or set; bake them on the longer end of the time range. If you need to make them ahead, bake until just tender, cool, then reheat loosely covered with foil at 350°F until hot and bubbling.
For food safety, always refrigerate leftovers within 2 hours of baking, store them in a covered container, and
