Heat 1 tablespoon olive oil in a large pot over medium-high heat. Once oil is shimmering, add in the 1 cup finely diced yellow onion and 1 cup finely diced red pepper. Cook, stirring often, about 5 minutes or until onion is translucent. Add in the 1 tablespoon finely minced garlic and stir for 30 seconds or until fragrant. Reduce the heat to medium and add in the 2 cups peeled and chopped sweet potatoes and cook, stirring occasionally for 7-9 minutes. If anything is burning or over-browning, reduce the heat a little.
Press the veggies to the side of the pot and add the 1 pound lean (80/20 or 90/10) ground beef in the center. Increase heat to medium high and cook, crumbling as you go, until browned on the outside, about 5 minutes. Incorporate the veggies as you cook the meat. If there is accumulated liquid, drain that off.
Add in 2 to 3 tablespoons chili powder, 2 teaspoons ground cumin, 1 teaspoon EACH: smoked paprika (or regular), dried oregano, beef bouillon powder, 3/4 teaspoon fine sea salt, 1/2 teaspoon EACH: onion powder, freshly cracked pepper, 1/4 teaspoon garlic powder, 1/4 teaspoon cayenne pepper, and 2 tablespoons tomato paste. Cook, stirring constantly for 2 minutes or until fragrant. Add in the 2 (14.5 oz.) cans fire-roasted crushed tomatoes and cook for another minute, stirring constantly. Add in the drained and rinsed 1 (15.25 oz.) can black beans, undrained 1 (16 oz.) can chili beans in mild sauce, 1 cup frozen corn and 1 cup chicken stock or broth. Stir, and bring mixture to a boil, then reduce heat and simmer, covered for 30-45 minutes or until chili thickens and sweet potato chunks are tender. Stir periodically as it simmers.
Remove from the heat. Season to taste with any additional salt/pepper, as needed. I like to add a few tablespoons of lime juice and about 1/4 cup chopped cilantro here.
Add your favorite toppings to individual bowls. We top ours with a good handful of freshly grated sharp cheddar cheese, another squeeze of lime, a good dollop of sour cream and some chopped cilantro. Don't leave off the toppings; they add a lot!