In a medium bowl, whisk together mayonnaise, sour cream, and milk until smooth and creamy (2-3 minutes). Stir in lime zest, lime juice, jalapeño, sugar, and black pepper.

Bring a large pot of salted water to a boil. Add spiral pasta and cook until al dente (8-10 minutes). Drain and rinse under cold water.

In a large skillet, heat oil over medium heat. Add ground beef and sauté until fully cooked (6-8 minutes). Drain excess fat and add taco seasoning.

In a large mixing bowl, combine cooled pasta, seasoned beef, and creamy dressing. Gently fold in red onion, red bell pepper, grape tomatoes, and cilantro.

Cover bowl and refrigerate for at least 4 hours (overnight for best results).

Before serving, check dressing consistency and adjust with milk if desired. Fold in cheddar cheese, Monterey Jack cheese, crushed Doritos, and avocados.

Garnish with additional crushed Doritos and cilantro. Serve in a large bowl.