Beef Enchilada Pasta {Easy, One Pot, 30-Minute Meal}

Name: Beef Enchilada Pasta {Easy, One Pot, 30-Minute Meal}
Prep time: 5 min
Cook time: 25 min
Total time: 30 min
Cuisine: Mexican
Ingredients: 1 Tbsp olive oil; 1/2 white or yellow onion, diced ((about 1 cup diced)); 1 lb lean ground beef (I used 90% lean) (*see notes); 2 garlic cloves, minced; 1 packet taco seasoning; 8 oz. medium egg noodles ((about 4 cups dry)); 1 19 oz. can red enchilada sauce; 1 cup water; 1 ½ cups sweet corn, frozen ((can also use canned corn, drained)); 1 15 oz. can black beans, rinsed & drained; 2 cups shredded cheese, tightly packed, divided ((I used an 8 ounce block Colby Jack)); black olives, sliced; cilantro, chopped