Cook the pasta: Bring a large pot of salted water to a boil. Cook the high-protein pasta according to package directions until al dente.
Drain and rinse under cool water to stop the cooking and prevent sticking.
Mix the dressing: In a large bowl, whisk the Greek yogurt, light ranch, taco seasoning, and lime juice until smooth. Taste and adjust seasoning with a pinch of salt, pepper, or extra taco seasoning if you like it bolder.
Add the chicken: Fold in the diced or shredded chicken so it gets coated with the dressing. This helps flavor the chicken and keeps it juicy.
Toss in the mix-ins: Add black beans, corn, cherry tomatoes, red bell pepper, red onion, and cheese.
If using, add cilantro and jalapeño.
Combine with pasta: Add the cooled pasta to the bowl. Toss gently until everything is evenly coated. If it looks a bit dry, stir in a splash more ranch or a spoonful of Greek yogurt.
Chill and serve: For best flavor, cover and refrigerate for at least 30 minutes.
Before serving, taste and adjust with more lime, salt, pepper, or taco seasoning as needed.