3 large garlic heads
3 tablespoons olive oil, plus more for serving
2 medium leeks, cleaned and thinly sliced crosswise (white and pale green parts only)
2 bay leaves
1 tablespoon finely chopped fresh rosemary leaves
Freshly ground black pepper
1 medium russet potato, peeled and medium diced
1/2 teaspoon smoked paprika, plus more as needed
4 cups low-sodium vegetable broth
12 ounces kale, tough stems removed and leaves cut into 1/2-inch slices (about 4 cups)
1 cup water
Heat the oven to 375°F and arrange a rack in the middle.
Peel any loose outer skins from the garlic heads and cut off the top quarter of each head to expose the cloves. Place the garlic heads, cut side up, on a large piece of foil, drizzle 1 tablespoon of the oil over all 3 heads, and wrap tightly to form a foil packet. Place the packet on a baking sheet and bake until the garlic cloves are golden brown and very tender, about 60 to 75 minutes. Remove from the oven, open the packet, and let the garlic sit until cool enough to handle. Squeeze the roasted cloves from their skins and place in a small bowl; set aside.
Heat the remaining 2 tablespoons oil in a large pot over medium heat until shimmering. Add the leeks, bay leaves, and rosemary, season with salt and pepper, and cook, stirring frequently, until the leeks have begun to soften and the herbs are fragrant, about 4 minutes. Add the potato, roasted garlic, and paprika, season with salt and pepper, and stir to combine. Cook, stirring occasionally, until a bit of crust begins to form on the bottom of the pan, about 10 minutes. Add the broth and, using a wooden spoon, loosen the crusty bits from the bottom of the pan and bring the soup to a boil. Reduce the heat to a simmer, cover with a tight-fitting lid, and let simmer until the potatoes are knife tender, about 15 minutes. Discard the bay leaves and remove the pan from the heat. Use an immersion blender to purée the soup in the pan.
Return the soup to a simmer over low heat. Add the kale and water and stir to combine. Cover and cook, stirring occasionally, until the kale is tender but still brightly colored, about 10 to 12 minutes. Taste and add more paprika, salt, and pepper as needed.
Recipe adapted from chowhound.com