Southwestern Chicken and Bean Pasta

I've made this recipe enough that I decided to post it with a few variations. I think it tastes like a pasta version of Chipotle's rice bowl, so I made it with rice, but it wasn't as good. Stick with the pasta...yum!

2 chicken breasts cooked and cut into small cubes
12oz pkg penne pasta, cooked per package directions
1/2 red onion, finely chopped
1 bunch green onion, chopped
2 medium tomatoes, chopped
1/2 red pepper, chopped
1 can black beans, rinsed and drained
1 small can sliced black olives, drained
1 cup corn (if canned, drained)
1 bunch fresh cilantro, chopped
1 cup sour cream
3 tbs milk
2 tbs olive oil
1 packet taco seasoning

Once the pasta is cooked and drained, all produce (fresh and canned) with pasta, toss until mixed. Mix sour cream, milk, oil and taco seasoning and add to pasta mixture, stirring over medium heat until warmed through.