1. Preparation is Key (The “Mise en Place”):

• Preheat Your Cooking Source:

  • For Grill: Preheat your grill to medium-high heat (around 400-450°F or 200-230°C).
  • For Oven: Preheat your oven to 400°F (200°C).

• Prepare the Chicken: If you haven’t already, cut the boneless, skinless chicken breasts into uniform 1-inch cubes. This ensures even cooking. Pat the chicken dry with paper towels; this helps the seasoning adhere better.
• Chop the Vegetables: Chop the red and green bell peppers and the yellow onion into roughly 1-inch pieces, similar in size to the chicken. This also promotes even cooking.
• Rinse and Drain: Thoroughly rinse and drain the canned black beans. Drain the canned corn (or thaw if using frozen).
• Chop Cilantro & Juice Lime: Finely chop the fresh cilantro and juice the lime. Set aside a little cilantro for garnish later.

2. Combine and Season:

• In a large mixing bowl, add the cubed chicken, chopped bell peppers, chopped onion, rinsed black beans, and drained corn.
• Drizzle the olive oil over the chicken and vegetable mixture.
• Sprinkle the taco seasoning evenly over everything.
• Add the 1/2 cup of salsa, the chopped cilantro, and the fresh lime juice.
• Season with salt and freshly ground black pepper to your taste. Remember that taco seasoning often contains salt, so you might not need much extra.
• Gently toss everything together until the chicken and vegetables are thoroughly coated with the oil, seasoning, and salsa. Ensure every piece gets some love!

3. Assemble the Foil Packets:

• Lay out your four large sheets of heavy-duty aluminum foil on a flat surface. If you don’t have heavy-duty foil, you can use two layers of regular foil for each packet to prevent tearing and ensure a good seal.
• Divide the chicken and vegetable mixture evenly among the four foil sheets, mounding it in the center of each sheet. Aim for roughly 1.5 to 2 cups of the mixture per packet.
• Sealing Technique (Important!):

  • Bring the two long sides of the foil sheet together above the filling.
  • Fold the edges over several times (at least twice, making about a 1/2-inch to 1-inch seam) to create a tight seal along the top.
  • Next, fold and crimp the two shorter ends of the foil packet several times to seal them completely. You want to create a well-sealed pouch that will trap the steam. Ensure there are no gaps where steam can escape. The packet should look like a somewhat flat rectangle or square pouch.
  • Leave a little bit of headroom inside the packet for steam to circulate, but don’t make it too loose.

4. Cook the Packets:

• For Grilling:

  • Place the sealed foil packets directly on the preheated grill grates.
  • Close the grill lid and cook for 18-25 minutes, flipping the packets once halfway through the cooking time (around the 9-12 minute mark) using tongs.
  • Cooking time will vary depending on the exact heat of your grill and the thickness of your chicken pieces.

• For Baking in the Oven:

  • Place the sealed foil packets on a large baking sheet (this catches any potential drips and makes them easier to transfer).
  • Bake in the preheated 400°F (200°C) oven for 20-28 minutes. There’s generally no need to flip them when baking in the oven, but you can if you wish.

• Checking for Doneness: The safest way to check if the chicken is cooked through is to carefully open one packet (beware of hot steam!) and use a meat thermometer. The internal temperature of the chicken should reach 165°F (74°C). Alternatively, you can cut into one of the larger pieces of chicken; the juices should run clear, and the chicken should be opaque and no longer pink in the center. Vegetables should be tender-crisp. If not quite done, reseal the packet and cook for a few more minutes.

5. Rest and Serve:

• Once cooked, carefully remove the foil packets from the grill or oven using tongs or oven mitts.
• Let the packets rest for 5 minutes before opening. This allows the juices to redistribute, resulting in more tender and flavorful chicken, and also allows the superheated steam to dissipate slightly, making them safer to open.
• To serve, you can either let everyone open their own packet (part of the fun!) or carefully open them and transfer the contents to plates. Be cautious of the hot steam when opening. You can cut a slit in the top with a knife or carefully unfold the crimped edges.
• Garnish with additional fresh cilantro, a squeeze of lime, and your favorite toppings.