In a large pot or dutch oven heat the olive oil over medium high heat. Add the onions and bell pepper and stir until they start to soften, about 3 minutes. Add in the ground beef and cook, stirring occasionally, until ground beef is cooked through.
Stir in the seasoning packet mix, the cumin, chili powder, cayenne, salt and pepper. Sauté a few minutes to bloom the seasonings. Add in all canned items into the pot and stir to combine.
Simmer the chili, uncovered, on low for about 30 minutes until all the flavors are blended. Taste for additional salt or pepper. Serve hot topped with sour cream, shredded cheddar cheese, and scallions if using.