This spicy cauliflower and broccoli gratin is a delicious and healthy side dish that is packed with flavor. The cauliflower and broccoli are roasted until tender and then smothered in a creamy and spicy cheese sauce. The dish is then topped with breadcrumbs and baked until golden and bubbly. It's the perfect accompaniment to any meal and is sure to be a hit with both kids and adults alike.