In a medium bowl, mix together the chili powder, cornmeal, cumin, cocoa powder, paprika, coriander, salt, and pepper. Add the hot water and stir until the mixture resembles a paste. Set aside for now.
Heat a large pot over medium heat. Add the ground beef, onion, and bell pepper. Cook, stirring frequently with a wooden spoon to break apart clumps, until the beef is browned completely and the vegetables are tender, about 8-10 minutes.
Drain off any excess fat.
Stir in the jalapeños and garlic. Cook for another 1 minute.
Add the chili paste mixture and Worcestershire sauce. Cook until fragrant, about another 1-2 minutes.
Add the beef broth and tomato sauce to the pot. Let the chili simmer until it thickens slightly, about 30 minutes.
Serve hot with toppings like shredded cheddar cheese and sour cream, if you like.