In a small pot, combine quinoa and water. Cook quinoa over low heat for about 10 minutes until water is absorbed. Remove from heat and set aside.
In a large skillet, sauté onions and sweet potatoes for about 4 minutes, until the onions have soften. Then add garlic sauté for about one minute, then add peppers and chili powder, cumin, smoky paprika and turmeric. Sauté for another 2-3 minutes to release the flavours of the spices.
Pour diced tomatoes into a bowl and crush the larger pieces if needed. Then add tomato paste, black beans, vegetable stock, and season with salt and pepper. Simmer over low-medium heat for 30-35 minutes stirring occasionally until the juices thicken.
Serve with quinoa. Garnish with scallions, avocados, parsley, cilantro, tofu, or vegan yogurt.