Preheat the oven to 375 degrees Fahrenheit. Line a large sheet pan with parchment paper.

Place the chicken, cubed sweet potatoes and green beans onto the pan.

In a small bowl mix together the mustard, maple syrup, olive oil, garlic, thyme and a shake of salt and pepper.

Pour most of this mixture over the chicken and the remaining over the sweet potatoes. Drizzle the olive oil over the green beans followed by the garlic powder and salt.

Lift the chicken and be sure both sides are coated in the sauce and toss the sweet potatoes together to coat.

Bake uncovered for 45 minutes or until the sweet potatoes have softened.