Roasted Cauliflower - With greens

2 heads cauliflower, broken into florets olive oil cooking spray 1/4 cup olive oil 1 large onion, chopped 4 cloves garlic, chopped 6 cups water salt and[...]

2 cloves garlic, minced 2 tablespoons vegetable oil 1 head cauliflower, broken into florets 3 tablespoons butter 2 leeks, white part only, chopped 1/4 cup[...]