Heat a large skillet over medium heat. Add the ground turkey or beef and cook until browned and no longer pink, about 7-10 minutes. If there is excess fat, drain it off gently.
Sprinkle in the taco seasoning and pour in approximately 2/3 cup of water as directed on the seasoning packet. Stir to combine and let it simmer on low heat for about 5 minutes.
In a spacious mixing bowl, combine the chopped romaine lettuce, drained black beans, corn kernels, halved cherry tomatoes, and diced avocado, stirring gently.
When the meat has finished cooking and seasoning, add it to the bowl filled with the vegetables. Stir carefully to incorporate all elements.
Generously sprinkle the shredded cheese over the top of the salad mixture, allowing it to melt slightly from the heat of the meat.
In a separate small bowl, whisk together the sour cream (or Greek yogurt) and lime juice. Season this dressing with salt and pepper to taste.
Drizzle the creamy dressing over the salad and gently toss all the ingredients to ensure everything is well coated.
Serve the salad immediately, garnishing each bowl with freshly chopped cilantro and a handful of tortilla chips on top.
Notes
Use large salad bowls for serving. Add extra slices of avocado and whole tortilla chips for garnish.