Pour olive oil in a large dutch oven. Add diced onion and cook until transparent. Add beef, veal and pork and cook until no pink remains. Drain as much fat as you can. Discard fat. Add flour to meet mixture and stir until beef is completely coated, about 1 minute. Add dried oregano and stir.
Now add the diced tomatoes, beans, ale, chili powder, cumin and brown sugar. Add salt and pepper to taste. Stir and let simmer to let flavors marry for one hour. Enjoy.
Can be frozen for up to 2 months.