Sauté the Base: In a large heavy-bottomed pot over medium heat, sauté the diced onion in 2 teaspoons of oil until it becomes soft and translucent.
Season the Vegetables: Add the diced sweet potatoes and all the spices (salt, garlic powder, pepper, chili powder, and cumin). Stir well to coat the potatoes in the oil and spices. Cover the pot and cook for 5 minutes to let the flavors "bloom."
The Main Simmer: Pour in 3 cups of the vegetable broth and bring to a low boil over medium-high heat. Once boiling, reduce the heat to medium-low.
Add Grains and Beans: Stir in the uncooked quinoa, both types of beans, the corn, and the cinnamon stick. Cover the pot tightly.
The Long Cook: Simmer for 30 minutes. You’ll know it’s done when the sweet potatoes are fork-tender and the quinoa has fully absorbed the liquid, leaving you with a thick, rich chili.
The Finishing Touch: Remove the lid and stir in the remaining 1 cup of vegetable broth to achieve the perfect consistency.
Rest and Marinate: For the best results, let the chili sit for at least 30 minutes before serving. This allows the spices to fully develop and the broth to thicken even further.
Serve: Remove and discard the cinnamon stick. Ladle into bowls and garnish with fresh cilantro, lime wedges, avocado, and your choice of vegan toppings.