In a large skillet set over medium heat, add the olive oil. When the oil is hot, add the onion and sauté until soft, about 4-5 minutes. Add the pepper, garlic, and seasonings. Continue to sauté until fragrant, about 2-3 minutes.
Add the ground beef and cook until no pink remains, breaking it apart into small chunks with a spatula or wooden spoon. When the meat is cooked throughout, pour in the tomato sauce, chicken broth, apple cider vinegar, and brown sugar. Simmer until about half of the liquid has evaporated, about 10 minutes. Remove from the heat and serve hot.
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Notes
Adding peppers is completely optional. If you don't want any heat, try adding half of a New Mexico Chile (Hatch) chile. We like ours to have a little kick, so we usually add minced jalapeño or serrano to it.To STORE your Beef Tacos, place the cooked meat in an airtight container and refrigerate for up to 4 days. To FREEZE, just transfer to a freezer-safe container and store for up to 3 months.REHEAT by thawing in the refrigerator overnight if frozen, then warm in a skillet over medium heat until hot, about 5-7 minutes. You can also microwave on medium power in 1-minute intervals, stirring between each.