Name: The Best All-Purpose Taco Filling
Prep time: 10 min
Cook time: 5 min
Total time: 15 min
Yield: 4 -6
Ingredients: 1 tablespoon extra virgin olive oil; 1 pound lean ground beef; 1 small sweet onion (, finely diced); salt and pepper; 1 packet ((1 ounce) taco seasoning (about 3 tablespoons)); 1 cup black beans (, rinsed and drained); 2 cups roughly chopped baby spinach leaves