In a large dutch oven over medium high heat, brown the ground beef until no longer pink.
Transfer the beef to a bowl using a slotted spoon.
Add the onion and bell pepper to the pot and cook until softened. Stir in the garlic and cook for minute.
Add the tomato paste and seasoning stirring to coat the onion mixture. Cook for 1-2 minutes.
Stir in the tomatoes, black beans, beef stock and worcesterirshire sauce.
Bring the mixture to a boil then add the macaroni and the half and half.
Cover and reduct the heat to low. Simmer for 15-20 minutes or until the pasta is tender and the liquid has been almost all absorbed. (Stir occasionally to keep the pasta from sticking to the borrow of the pan.
Remove the lid and stir in the cheese 1/2 a cup at a time until melted.
Serve with sliced jalapeños, crumbled cojita cheese and cilantro.