In a deep skillet, heat the olive oil/butter. Sauté the shallots briefly. Add the zucchini and toss. Cook and stir over medium to medium-high heat until the zucchini reaches a spreadable consistency. If you scorch the bottom, turn the flame down! (And scrape those delicious bits into the marmalade for added flavor.) The zucchini will hold its bright green color and slowly caramelize into a nice vegetable jam.
Enjoy on toast, or as a side dish!
Keeps well and can be stored in the refrigerator for about a month.
One of my friends used red onion and garlic. She said it was fantastic!