Coconut Black Bean and Sweet Potato Soup

This soup started with a simple idea: put the things that love each other in one pot and let them get acquainted. Sweet potatoes and black beans are a classic pairing across Latin American kitchens, where beans are cooked slowly and sweet root vegetables turn up in stews and soups alike. The sweetness of the potato rounds out the earthiness of the beans, and a spoonful of chili powder gives the whole pot a warm, low hum of smoke without needing much else.

A food fact worth knowing: sweet potatoes and regular potatoes are not related, even though people mix them up all the time. Sweet potatoes belong to the morning glory family, and their flesh ranges from pale cream to deep orange depending on the variety. The orange ones are the ones most people buy, and they break down into a soft, almost custardy texture when simmered, which is exactly what makes this soup feel thick without any cream.

A cooking tip from my own pot: cut the sweet potatoes into pieces that are close to the same size, so they finish together. If a few pieces go to mush before the rest are tender, you can lightly mash them against the side of the pot and the broth will turn velvety. Add the spinach only at the very end and turn off the heat once it wilts. Overcooked spinach goes dull and stringy, and you lose the bright green that makes the bowl look fresh.

This soup keeps well. Cool it, then store it in the fridge for three or four days. It often tastes better the next morning, once the spices have had time to settle into the broth. For a freezer batch, leave out the spinach and add fresh leaves when you reheat. Thaw overnight in the fridge and warm it gently on the stove, adding a splash of water if it has thickened too much.

For a bigger meal, serve a bowl alongside a plate of Fajita Bowls with Cauliflower Rice if you want something to pile on top, or set out a Smoky Skillet Mashed Pinto Beans for scooping. If you are feeding a crowd on a cold night, a Hearty Weeknight Turkey Chili makes a hearty companion. Toppings are where you can have fun: a squeeze of lime, a few slices of avocado, some chopped cilantro, or a spoonful of plain yogurt in place of sour cream all work well and add freshness without fuss.