au gratin -boil or steam vegetables (broccoli is a good choice) until just tender and put in a gratin dish (a low-sided oven-proof dish)
in french au gratin is a cheese-topped dish
"au gratin -boil or steam vegetables (broccoli is a good choice) until just tender and put in a gratin dish (a low-sided oven-proof dish)" What is the definition of "au gratin"?