It may appear very oily at first, but this dish comes together in the end without being the least bit heavy. We realize that not everyone will have 3 colanders on hand. You can also toss the vegetables with salt and let them drain in large bowls.
Cooks' note:
Vegetable medley can be made 1 day ahead and chilled, covered. Reheat slowly, covered, over low heat 30 to 40 minutes.