INGREDIENTS
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2 sweet potatoes
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1 tablespoon oil
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1 heaping teaspoon each cumin and chili powder (plus a sprinkle of cayenne if you like it hot)
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salt and pepper to taste
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1 14-ounce can black beans, rinsed and drained
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1 14-ounce can sweet corn, rinsed and drained
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1 romaine heart, chopped
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half an avocado
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1/4 cup Greek yogurt
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1/2 cup water
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1 cup cilantro leaves and stems
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1 small clove of garlic
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1/2 teaspoon salt
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a squeeze of lime juice