Southwestern Grilled Sweet Potato Salad

medium sweet potatoes, peeled and cut into 3/4 inch slices

olive oil

Salt and pepper,

ear sweet corn, husked

black beans, rinsed and drained

red pepper, diced

green onions, chopped

chopped cilantro

avocados, pit and skin removed, chopped

Juice of 2 limes

Salt and pepper,