I usually mix other greens with the kale, but it's totally up to you. I like the mixture of tender and tougher greens.I didn't have time to make croutons, but you can use your favorite grain-free bread to make croutons, or try my Parmesan croutons recipe. To make croutons from bread, slice the bread into cubes, brush lightly with oil, salt, and garlic powder, and bake for a few minutes at 350°F (180°C, or gas mark 4).