Prepare the cauliflower by cutting it into small florets.
Place the cauliflower in a large bowl. Drizzle it with olive oil and season with freshly ground pepper. Mix the cauliflower so that it is evenly coated.
Place the cauliflower in an 8 inch x 8 inch baking pan and set it in the oven to roast for 30 minutes.
Meanwhile, remove the stems from the kale and cut it into bit sized pieces.
In a large bowl, drizzle the kale with olive oil and season with freshly ground sea salt.
Spread the kale out on a rack in a sheet pan.
Once the cauliflower has roasted for 20 minutes, put the kale in the oven and roast both vegetables for 10 minutes. Gently stirring the kale after 5 minutes will help ensure the leaves cook evenly. The cauliflower should be tender and the kale crispy. Both may brown slightly.
Remove vegetables from the oven and mix in a serving bowl or individual serving dishes.
Add tomatoes immediately if enjoying as a warm salad. If a warm salad is not what you desire, let the kale and cauliflower cool before adding the tomatoes.
Enjoy as-is, with drizzled balsamic vinegar, or with your favorite vinaigrette.
Notes
In this recipe, I used gold nugget tomatoes and a mix of Tuscan and dwarf Siberian kale varieties.