Looks like Martha Stewart agrees. This info and recipie was taken from her site. Named for the cross-shaped flowers they bear, crucifers contain a wide variety of disease-fighting antioxidants and phytochemicals -- including carotenoids, vitamin C, and indoles, which scientists believe may stave off the growth of cancerous cells in the stomach, colon, and lungs. Kale, collard greens, and turnip greens provide calcium as well; brussels sprouts, iron. And all crucifers are also sources of complex carbohydrates and fiber.
1 1/2 tablespoons extra-virgin olive oil
1 teaspoon mustard seeds
1 teaspoon cumin seeds
3/4 teaspoon curry powder
3/4 teaspoon coarse salt 1 large head cauliflower (about 2 pounds), cut into large florets
Nonstick olive-oil cooking spray
Preheat oven to 375 degrees. Coat a rimmed baking sheet with cooking spray. In a large bowl, stir together oil, mustard seeds, cumin seeds, curry powder, and salt. Add the cauliflower, tossing to coat thoroughly with spice mixture.
Arrange cauliflower in a single layer on prepared sheet. Roast until florets are browned on bottom and tender when pierced with the tip of a paring knife, about 35 minutes. Serve hot.