In a small bowl, stir together the garlic, chili powder, cumin, coriander, sugar and salt.
Heat the oil in a Dutch oven over medium-high heat until shimmering. Sprinkle the meat with salt and cook until browned on both sides, about 6 to 8 minutes. Remove the meat to a plate.
Reduce the heat to medium, add the onions to the pot and cook until golden brown, about 5 minutes. Stir in the garlic mixture and cook until fragrant, about 1 minute. Add the tomato sauce and water and bring to a boil. Return the meat and any accumulated juices to the pot, cover, reduce the heat to low, and simmer until the meat is tender and can be broken apart easily, about 1½ hours.
