Preheat your oven to 375 degrees Fahrenheit. This will ensure the chicken-based substitute is evenly cooked.
Whisk together the Dijon mustard, maple syrup, tamari or soy sauce, apple cider vinegar, olive oil, minced garlic, smoked paprika, and onion powder in a mixing bowl. Ensure all the ingredients are well combined, creating a smooth and flavorful sauce.
Place the plant-based chicken substitute in a baking dish or oven-safe skillet. Pour the prepared sauce over the chicken, ensuring it is evenly coated. Use tongs or a spatula to toss the chicken, ensuring each piece is well covered in the sauce. Allow the chicken to marinate for at least 15 minutes, allowing the flavors to meld together.
Cover the baking dish or skillet with aluminum foil or a lid to retain moisture. Place the dish in the preheated oven and bake according to the instructions provided with the plant-based chicken substitute. Typically, it will take around 20-25 minutes, or as directed on the packaging, until the chicken is cooked and slightly browned.
Carefully remove the baking dish from the oven using oven mitts or potholders. Remove the foil or lid and flip the chicken pieces with tongs or a spatula. This helps ensure even cooking and browning on both sides.
Return the uncovered baking dish to the oven and continue baking for another 10-15 minutes or until the chicken is golden brown and crispy around the edges. Adjust the cooking time as needed, keeping an eye on the chicken’s appearance and doneness.
Once the Vegan Honey Mustard Chicken is cooked to your liking, remove it from the oven. Optionally, garnish with fresh parsley or chopped scallions for added freshness and color. Transfer the chicken to a serving plate or platter, and serve it hot with your favorite sides or accompaniments.