Combine ground beef, onions, and garlic in a large greased stockpot over medium to medium-high stovetop heat.
Cook and stir until the beef is browned and no longer pink. This will be about 7-10 minutes. Once cooked, drain the meat.
Add in the chili powder, oregano, and green pepper. Mix together until the beef mixture is coated with the spices.
Add the tomato paste. Fill the empty tomato paste cup with water and add to the stock pot. Then add the tomatoes. Mix all the ingredients, cover the pot, then reduce the heat to low and allow it to simmer for 40 minutes. Make sure to occasionally stir the chili.
After 40 minutes, add the kidney beans with the liquid. Stir the chili and allow to simmer with the cover off for another 20 to 30 minutes.
Scoop the chili into bowls and add any extra fixings such as sour cream, shredded cheese, sliced jalapenos, diced green onions, crackers, etc.