Preheat oven to 400 degrees.
For veggies: cut zucchini & squash into thick coins then in half. Dice bell peppers & onions into large squares.
For sausage, cut into thick coins.
Into medium sized bowl, add 1/2 tbsp olive oil, 1 tsp cajun seasoning & a pinch of salt and pepper. Stir together. Next add shrimp into bowl & toss until all shrimp are coated.
Into a large bowl, add 1.5 tbsp olive oil, 3 tsp cajun seasoning & the rest of the salt & pepper. Stir together. Add in all vegetables and sausage. Mix until all are coated in "seasoning".
Create 3 equal size large aluminum foil squares. Add 1/3 of vegetable mix & 1/3 of shrimp into each square. Fold all 4 sides until sealed (leave a little space so has room to steam.
Place foil packs onto baking sheet & place in oven. Bake for 15 minutes until vegetables are soft & shrimp is cooked through.
Remove foil packs from oven. Allow a few minutes to cool down then carefully open packs to release steam. Serve immediately & enjoy!
Depending on how you feel about reheating shrimp, you can keep in refrigerator for up to 5 days in air tight container.