Preheat the oven to 400°. In a large bowl, mix all the ingredients except for the crackers and crudités; season with salt and pepper. Transfer to a 1 1/2-qt. gratin dish and bake until bubbly and browned in spots, about 25 minutes. Let cool slightly. Serve with the crackers and crudités.
Mixed Veggies: Add a little surprise to your crudités platter by steering away from the carrots and celery and grabbing yellow wax beans, radicchio leaves, and several kinds of radishes instead.