I started making these when I was first married, over 30 years ago. They are great appetizers for football or sporting event parties with many hungry people. I also make these for a quick dinner to serve with canned tomato soup.
Originally from my mother-in-law and based on a New England dish. I've modified it over the years to fit my family's taste. The amount of vegetables can certainly be varied according to your own preference.
My mother-in-law served these during holidays when we were tired of cooking, and needed something easy to make. My husband and I have even made these ahead of time while traveling by car, and put them in the engine compartment to melt the cheese. We just took them out when we got to a rest stop and had hot sandwiches!
My husband only likes very firm, hard nectarines. When we end up with too many softer ones (the way most people like them), I make this recipe. It's great warm or at room temperature for brunch or dessert.