Add the oil to a large, heavy-bottomed pot, such as a Dutch oven, and place it over medium-high heat. When the oil shimmers, add the diced onion, bell pepper, and celery. Sauté until the vegetables are soft and fragrant, about 5 minutes. Stir in the minced garlic and cook for another minute so it blooms in the heat.
2 tbsps (30 ml) olive oil, 1 large sweet onion or yellow onion, 1 large green bell pepper, 1 rib celery, 6 cloves garlic
Add the ground chicken and break it apart with a wooden spoon as it cooks. Let it brown thoroughly, stirring occasionally, until no pink remains. Take your time here; good browning adds flavor that carries through the chili.
1 lb (454 g) ground chicken
Once the chicken is browned, stir in the crushed tomatoes, diced tomatoes with chilies, black beans, fire-roasted corn, tomato paste, bouillon, cumin, chili powder, oregano, onion powder, salt, and pepper. Mix well to combine everything evenly.
1 can (28 oz / 794 g) crushed tomatoes, 1 can (10 oz/ 283 g) diced tomatoes with chiles, 1 can (15 oz / 425 g) black beans, 1 can (15 oz / 425 g) fire-roasted corn, 2 tsps (6 g) chicken bouillon, 1 tsp (2 g) ground cumin, 1 tbsp (6 g) chili powder, ½ tsp (0.5 g) dried oregano leaves, ½ tsp (1 g) onion powder, 1 tsp (6 g) table salt, ½ tsp (1 g) black pepper, 1 tsp (6 g) tomato paste
Pour in the water and stir again, scraping up any bits from the bottom of the pot. Bring the mixture to a gentle boil, then reduce the heat to low. Cover and let the chili simmer for 45 to 60 minutes, stirring occasionally as it thickens and the flavors meld together.
2 cups (480 ml) water
Taste and adjust seasoning if needed. Serve warm with tortilla chips, cheese, avocado, cilantro, or sour cream.