Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make barbacoa [title] Puree the sauce ingredients. [step] Combine the chopped onions, olive oil, garlic, cumin, oregano, chiles, cider vinegar, and salt in a blender or food processor. Blend the ingredients together at medium to high speed until a thick puree forms.

Ending1: [substeps] Puree the sauce until it is smooth but you have pureed all the ingredients and are still shaking it. This can take anywhere from a few minutes to several hours. Ending2: [substeps] Do not over puree the sauce. The stain of the maillard sauce will prevent it from adequately processing. Ending3: [substeps] Do not drain the adobo sauce from the chipotle chiles before adding them. You should pour the sauce into the blender along with the chiles. Ending4: [substeps] If using taco seasoning, pulse the mixture until it becomes thick. Place it back in the blender and pulse again until it forms smooth.

Answer format: ending1/ending2/ending3/ending4