For sauce, in a medium saucepan cook sugar over medium-high heat until it begins to melt, shaking the pan occasionally (do not stir). Reduce heat to low; add onion and garlic. Cook and stir for 5 minutes more or until mixture is golden brown. Bring beer or water just to boiling in a small skillet. Carefully and gradually add boiling beef or water to sugar mixture, stirring constantly. Whisk in tomato paste, Worcestershire sauce, vinegar, habanero sauce, chipotle peppers, and salt. Bring to boiling; reduce heat. Simmer, uncovered, for 15 to 20 minutes or to desired consistency. Set aside.
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