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If broiling/grilling: Preheat broiler/grill. Arrange onions and mushrooms in a single layer and broil 5 minutes or until mushrooms are tender. Remove mushrooms to serving platter and continue to broil onions a few more minutes until they're done, then remove. Add squash and zucchini, again in a single layer. Broil approx 8 minutes or until tender. Sprinkle the veg with salt to taste.
posted by T5NF