Salt the pasta water and cook the tri color rotini according to the package instructions for al dente. Once it is done, drain immediately and rinse with cold water.
Add the bell pepper, cucumber, broccoli, and rotini to a large serving bowl
In a small bowl, combine the mayo, sour cream, and ranch seasoning to make the creamy ranch dressing
Stir the ranch dressing into the pasta and veggies until combined. Salt to taste, if necessary
Refrigerate for no more than 1-2 hours before serving
Store leftovers covered in the fridge and enjoy within 3-4 days.
Notes
Most pasta salad will dry out some in the fridge, so if this happens I suggest stirring in a little bottled ranch before serving your leftovers