Preheat the oven to 400F.
Line a large baking sheet with parchment paper.
Cut potatoes into bite-sized cubes and place them into a large bowl with the cauliflower, rosemary, olive oil, and salt. Toss to combine.
2 lb baby potatoes,, 2 cups cauliflower florets, 3 sprigs fresh rosemary,, 2 Tbsp olive oil, 1 tsp sea salt
Evenly arrange the veggies on the pan. Roast them in the oven for 40-45 minutes or until potatoes are tender and cauliflower starts to brown
While vegetables are roasting, prepare the dressing. To do so, simply combine olive oil, garlic cloves, Dijon mustard, red wine vinegar, lemon juice, sea salt, and ground black pepper.
¼ cup olive oil, 2 medium cloves garlic,, 1 Tbsp Dijon mustard, 2 Tbsp red wine vinegar, 1 Tbsp lemon juice, ¼ tsp sea salt, 1 pinch ground black pepper
When 40 minutes are up, put roasted cauliflower and potatoes into a large bowl and add the finely chopped greens. Toss everything together until the greens begin to wilt.
3 cups kale,
Add dressing and stir to coat.
Serve topped with extra rosemary if desired, and salt and pepper to taste.