Preheat your oven to 400°F and line a large baking sheet with parchment paper if desired for easier cleanup. Cut four large sheets of heavy-duty aluminum foil and place them flat on the counter. Make sure each sheet is large enough to fully wrap the chicken and vegetables while leaving space inside for steam to circulate during baking.

Pat the chicken dry with paper towels before cutting it into evenly sized bite-sized pieces. Drying the chicken first helps the seasonings stick better and prevents excess moisture from watering down the flavors inside the foil packets.

Add the chicken pieces to a large mixing bowl along with the chopped pineapple, sliced bell peppers, zucchini, and minced garlic. Try to keep the vegetables relatively uniform in size so everything cooks evenly and finishes tender at the same time.

Drizzle the olive oil and fresh lemon juice over the mixture. Sprinkle in the oregano, turmeric, smoked paprika, sea salt, and black pepper. Using a large spoon or clean hands, toss everything together thoroughly until all the chicken and vegetables are evenly coated in the seasoning mixture. Take an extra minute here to make sure the spices are distributed well so every bite is flavorful.

Divide the seasoned mixture evenly between the four foil sheets, placing the ingredients in the center of each piece of foil. Avoid overfilling the packets because crowded packets can steam unevenly and cause the vegetables to become too soft.

Fold the foil over the chicken and vegetables and seal the edges tightly to create secure packets. Leave a little room inside each packet so the hot air and steam can circulate properly while cooking. Double-folding the edges helps prevent juices from leaking onto the baking sheet.

Carefully place the foil packets onto the prepared baking sheet in a single layer. Transfer the baking sheet to the preheated oven and bake for 25–30 minutes, or until the chicken is fully cooked and reaches an internal temperature of 165°F. The vegetables should be tender while still holding their shape, and the pineapple should look lightly caramelized around the edges.

Remove the baking sheet from the oven and allow the packets to rest for 2–3 minutes before opening. Be careful when unsealing the foil because hot steam will escape immediately. The aroma of garlic, herbs, lemon, and roasted pineapple will be incredibly fragrant at this stage.

Spoon the chicken, vegetables, and flavorful juices onto serving plates or enjoy directly from the foil packets for a cozy, casual dinner. Garnish with fresh parsley, basil, or an extra squeeze of lemon juice if desired, and serve warm while everything is juicy and fresh.