In a large deep skillet or pot, brown ground beef in the olive oil over high heat. Season the meat with salt and pepper, then add Worcestershire sauce. When the meat is browned and crumbled, reduce heat to med-high, then add onion, garlic and jalapeno.
Season veggies and meat with chili powder and cumin. Cook veggies and meat together for 5 minutes.
Stir in broth and scrape up pan drippings. Stir in diced tomatoes, tomato sauce and black beans. When the mixture comes to a bubble, reduce heat and simmer 5 minutes more.
Preheat the broiler. Transfer chili to a shallow casserole and top with the corn chips and cheese. Melt cheese under broiler. Tope casserole with cilantro and scallions and serve.