In a large saucepan, heat the vegetable oil. When the oil is hot, add the onions and saute for 3 to 5 minutes, or until the vegetables start to wilt. Season with salt and cayenne. Stir in the beef , chili powder, cumin, crushed red pepper, and oregano. Brown the meat for 5 to 6 minutes. Stir in the garlic, tomatoes, tomato paste, beef stock, and beans. Bring the liquid up to a boil and reduce to a simmer. Simmer the liquid, uncovered for 1 hour, stirring occasionally, or until the beef is tender. Skim off the fat occasionally. Mix the masa and flour together with a little liquid from the stockpot. Slowly stir in the masa slurry and continue to cook for 30 minutes. Reseason with salt and cayenne. Place a handful of the chips in each shallow bowl. Spoon the chili over the chips. Garnish with the grated cheese, sour cream and jalapenos.