Southwestern Pasta Salad with Creamy Avocado Dressing

pasta (I used Rotini)

black beans, drained and rinsed

grape tomatoes

diced red bell pepper

diced orange or yellow bell pepper

diced red onion

sweet corn (can use frozen corn)

large avocado, peeled, seeded, and diced

Salt and pepper,

lime, for juicing over the salad

chopped cilantro

ripe avocados, peeled and seeded

plain Greek yogurt

low-fat buttermilk

garlic, minced

chopped fresh cilantro

chopped green onion

small jalapeño pepper, chopped and seeds removed

fresh lime juice

ground cumin

Salt and ground black pepper,