Cajun Shrimp and Sausage Foil Packets

large shrimp, peeled and deveined (fresh or frozen and thawed, rinsed and patted dry)

package (17oz) smoked chicken sausage (fully cooked), sliced

medium zucchini, halved lengthwise and sliced

red peppers, cut into one inch chunks

mushrooms, quartered

olive oil or melted butter

Cajun seasoning

fresh chopped parsley and lemon wedges for serving