Heat the vegetable oil in a heavy-bottomed pot or Dutch oven over medium heat. Add the ground beef and cook, stirring occasionally, until browned, about 10 minutes. Add the garlic, onions, jalapenos and red bell pepper and cook, stirring occasionally, until the vegetables have softened, about 4 minutes.
Stir in the chili powder, cumin, salt and pepper. Evenly coat the ground beef mixture and cook to toast the spices for about a minute. Add the tomatoes and bring the mixture up to a simmer. Stir in the brisket, pastrami and smoked beans. Cook, uncovered, stirring occasionally, to thicken and bring the flavors together, about 35 minutes. Serve bowls of chili hot with some sour cream, Cheddar, and red onion.
Brisket ends can generally be purchased from most barbecue places.