Cook the Ground Beef:
In a medium pot or skillet, heat the olive oil over medium heat. Add the ground beef and cook, breaking it up with a wooden spoon, until browned and fully cooked, about 6-8 minutes. Drain any excess fat if necessary.

Sauté the Onions and Garlic:
Add the finely chopped onion to the beef, and cook until softened, about 3 minutes. Add the minced garlic and cook for another minute until fragrant.

Add the Spices and Seasonings:
Stir in the chili powder, paprika, cayenne pepper, ground cumin, sugar, salt, black pepper, and cinnamon (if using). Mix well to evenly coat the beef and onions with the spices.

Add Tomato Paste and Liquids:
Add the tomato paste to the mixture and stir it in. Then, pour in the water, vinegar, Worcestershire sauce, mustard, and hot sauce (if using). Stir to combine all the ingredients.

Simmer the Chili Sauce:
Bring the sauce to a gentle simmer. Lower the heat and let it cook for 30-45 minutes, stirring occasionally. The sauce should thicken to a rich, hearty consistency. If it gets too thick, add a little more water, a tablespoon at a time.

Taste and Adjust:
Taste the chili sauce and adjust the seasoning as needed. You can add more salt, pepper, or spices to suit your taste.

Serve:
Spoon the hot chili sauce generously over hot dogs, fries, or any other dish you like. It’s also great as a topping for chili cheese fries!