Arrange flowerets in a steamer basket over boiling water. Cover and steam for 6 to 8 minutes or until crisp-tender. Drain well.
Arrange flowerets in a lightly greased 2-quart baking dish.
Stir together mayonnaise and next 5 ingredients. Spoon over flowerets. Sprinkle with breadcrumbs.
Bake at 350° for 20 to 25 minutes or until golden.
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