Cheesy Beef Taco Skillet

Name: Cheesy Beef Taco Skillet
Prep time: 5 min
Cook time: 15 min
Total time: 20 min
Cuisine: Mexican
Ingredients: 1 lb lean ground beef; 1 large yellow onion (diced); 2 bell peppers (diced); 1 can diced tomatoes with green chilis; 1 large zucchini (shredded); taco seasoning; 3 cups baby kale/spinach mixture (this sounds like a lot- it cooks down to a small amount); 1 1/2 cup shredded cheddar and jack cheese; green onions (to garnish)