Add the onion, garlic, and red pepper.
Saute until fragrant, about 3 minutes.
Add the ground beef and brown, about 5 minutes.
Photo: Hector Sanchez
Stir in the tomato paste, chili powder, cumin, salt, black pepper, and cinnamon.
Simmer, stirring occasionally, until thickened slightly, about 12 minutes.
Spoon onto the buns.
Sprinkle each with the Cheddar and top with a dollop of the sour cream.
2,000 calories a day is used for general nutrition advice.
