Shrimp & Veggie Orzo with Pesto Vinaigrette

orzo pasta, cooked according to package instructions

small shrimp, peeled and deveined (tails removed

red bell pepper, thinly sliced

medium zucchini, chopped

medium yellow squash, chopped

minced garlic

olive oil

salt and pepper

optional: fresh basil

pesto

vinegar

olive oil