Heat 1 tablespoon of the reserved bacon drippings in the saucepan over medium-high heat. Add the onion and bell pepper and cook, stirring, until soft, about 5 minutes. Add the garlic and 1 teaspoon salt and cook 2 minutes. Add the chili powder, cumin, paprika, oregano and tomato paste and cook, stirring, until the tomato paste is brick red, about 6 minutes (add a splash of water if the mixture begins to stick). Add the beer and simmer until almost completely reduced, about 3 minutes.