Puree the tomatoes in a blender until smooth.
Heat the butter in a medium saucepan over medium high heat until melted and bubbling then stir in the onion, pepper, garlic, 1/4 teaspoon salt and 1/2 teaspoon pepper. Cook, stirring occasionally, until onion is golden brown, 6 to 8 minutes. Add chorizo, stirring to break up lumps, and cook until browned, about 6 minutes. Add the pureed tomatoes, beer, jalapenos, Worcestershire, and sugar, and boil until the sauce has thickened, 14 to 18 minutes. Remove from heat and season with salt. Serve with sour cream and cilantro on rolls.
From Food Network Kitchens