Roasted Cauliflower and Radishes
4 cups (400 g) cauliflower florets15 to 18 small red radishes sliced (2 to 3 cups)1 tablespoon safflower or other neutral oil2 teaspoons fennel seeds1 teaspoon mustard seeds1 teaspoon nigella seeds1 teaspoon red pepper flakes or to taste3/4 to 1...