Begin the recipe by preheating the oven to 375 degrees F. and make sure the oven rack is in the center location of the oven.
Grab some parchment paper and cut it into four large rectangles, make sure it is big enough to fold over your fish. Generously season both sides of each piece of fish with the 1 tablespoon chili lime seasoning blend. Set aside.
Working with one piece of parchment paper and fish at a time. Place an even layer of ¼ cup corn at the bottom of the middle of the parchment paper.
Top with a piece of seasoned fish, followed by the chopped red onion, ½ tablespoon butter, and a squeeze of lime for the juice. Feel free to top with an additional slice of fresh lime as well.
Fold the parchment paper over to cover the fish and roll tightly to completely cover. I prefer to fold the shortest sides into the fish first followed by joining the two remaining longest end over the top, then rolling down tightly until I reach the end. Continue this process with the remaining pieces of parchment paper and ingredients.
Place each packet on a baking sheet and place into the preheated oven. Bake for 12 to 15 minutes depending on the size of your fish.
Carefully remove the packet from the oven and allow them to sit and steam for an additional 2 to 3 minutes before serving. Open the packets easily with a fork.
Serve warm topped with your favorite fresh toppings such as chopped cilantro, sliced grape tomatoes, avocado, or salsa blend. Store any leftovers in an airtight container up to 1 day.