You could really use any combo of veggies here.  This is just one example using spring veggies.  Also try adding greens like lettuce or even the tops from the radishes!

1-2 cups cooked chicken, chopped
¼-½ cup scallions, thinly sliced at an angle
½-1 bunch radishes, sliced
handful of snap peas, snapped and chopped
½-1 bunch cilantro, washed and chopped

4 TBLS olive oil
2-3 TBLS lime juice (or lemon/vinegar)
Seasonings to taste: cayenne powder, cumin, salt, pepper

Whisk above together to make dressing.  Pour over tossed salad ingredients.