01 - Combine ground beef and water in a large stockpot. Break up meat thoroughly with a wooden spoon—do not brown the beef as this affects the authentic texture.
02 - Add chopped onion, garlic, tomato sauce, tomato paste, Worcestershire sauce, vinegar, brown sugar, chili powder, cinnamon, cocoa powder, allspice, cumin, cloves, cayenne pepper, bay leaf, salt, and black pepper. Stir until well combined.
03 - Bring mixture to a gentle boil over medium-high heat, then reduce to low. Simmer uncovered for 1 hour 30 minutes, stirring occasionally. Skim any fat from surface as needed.
04 - Taste chili and adjust salt or spice levels as desired. Remove and discard bay leaf.
05 - While chili simmers, cook spaghetti according to package directions until al dente. Drain well in a colander.
06 - Layer cooked spaghetti in bowls and ladle chili sauce over pasta. Top as desired: two-way (spaghetti + chili), three-way (add cheddar cheese), four-way (add onions or beans), or five-way (add onions and beans).