Combine the ranch dressing, jalapenos, lime juice, and garlic in a high powered blender or food processor. Pulse until completely smooth.
Bring a large pot of salted water to a boil. Cook the rotini according to package directions. Drain pasta, run under cold water until completely cool, set aside.
In a large bowl, mix together the pasta and jalapeno ranch. Add the jalapenos, cheddar, pepper jack, and bacon, stir well to combine.
Stir in half of the crushed croutons. Top the pasta salad with remaining croutons before serving. Chill until ready to serve.
Notes
NOTE: You can leave the seeds in the jalapeno ranch if you prefer it spicier!