Prepare the ingredients: Clean and trim the Brussels sprouts, slice the onions, peel the butternut squash and cut it into chunks similar in size to the Brussels sprouts, cut the potatoes into chunks or if you are using baby potatoes, cut them in half. Mix the oil, balsamic, crushed garlic, honey, mustard and lemon juice together in a small bowl and set it aside. Line a baking sheet with parchment paper and preheat the oven to 400 degrees F.
Arrange the prepared vegetables on a parchment-lined baking sheet in a single layer.
Add one-half of the sauce mixture and gently toss the veggies and sauce together.
Place the chicken pieces onto the sheet pan with the vegetables, and use a basting brush to brush the remaining sauce onto the chicken pieces.
Place the sheet pan into the preheated oven and bake for approximately 25 minutes. Check the temperature of the chicken and if is not at least 165 degrees, continue to cook for a few minutes longer.
Notes
SubstitutionsBoneless chicken breasts can be substituted with boneless skinless chicken thighs or a mixture of both.Fresh garlic can be substituted with 1/4 teaspoon of garlic powder for each clove of garlic.Vegetables can be substituted with any combination of your favorite seasonal vegetables.VariationsReplace the chicken with boneless pork chops.Change up the sauce and replace the balsamic vinegar with an equal amount of tamari or soy sauce. Or use a simple baking sauce of honey, mustard, garlic, oil and lemon juice.