Step 1: Roast the potatoes
Preheat the oven to 425°F (220°C).
Place sweet potatoes and baby potatoes on a large baking sheet. Drizzle with olive oil. Add rosemary, salt, and pepper. Toss well. Spread into a single layer. Roast for 30–35 minutes, flipping once, until golden and tender.
Step 2: Prepare the kale
Add chopped kale to a large bowl. Drizzle with a small amount of olive oil and a pinch of salt. Massage with your hands for about one minute until the leaves soften and darken.
Step 3: Make the dressing
In a small bowl, whisk olive oil, lemon juice, Dijon mustard, honey, and garlic. Taste and add salt if needed.
Step 4: Build the salad
Add warm roasted potatoes to the kale. Toss gently. Add quinoa and roasted cauliflower if using. Sprinkle feta over the top. Drizzle with dressing and toss lightly.
Step 5: Serve
Serve warm or at room temperature. Taste and adjust seasoning if needed.