Portobello Mushrooms With Tuscan Kale and Sweet Potato
Makes 2 to 3 servings as main-course or 4 to 6 as appetizers.
Note: For a complete dinner, serve with a green salad. Adapted from "Eat More Greens," by Zita Steyn (Quadrille, 2017).
• 9 oz. sweet potato, peeled and cut into 1-in. dice
• 1/2 tsp. fine sea salt, plus more as needed, divided
• 1 tbsp. extra-virgin olive oil
• 1 medium onion, chopped (about 1 c.)
• 1 large garlic clove, chopped
• 4 oz. Tuscan kale, thick stalks removed, leaves rinsed and coarsely chopped (about 2 c. packed; may substitute another variety of kale)