Preheat the oven to 425°F. Spray a large baking sheet with nonstick cooking spray or line with parchment paper.
In large mixing bowl, add the 1 ½ lbs red baby potatoes along with 3 minced garlic cloves, 2 Tbsp olive oil, 2 Tbsp fresh grated parmesan cheese, 1 tsp Italian seasoning, ½ tsp salt and ¼ tsp ground black pepper. Toss the potatoes with the seasoning ingredients.
Spread the potatoes on to one-third of the baking sheet in a single layer. Place in the oven to bake for 15 minutes.
While the potatoes are baking, in a medium bowl mix together the honey mustard sauce: ⅓ cup honey, 3 Tbsp yellow mustard, 3 Tbsp dijon mustard, 2 minced garlic cloves, 1 tsp onion powder, and 1 tsp paprika.
Add the sliced raw chicken to a large bowl. Pour the honey mustard sauce on top and toss with the chicken.
Once the potatoes have finished cooking for 15 minutes, remove the baking sheet from the oven. Arrange the chicken in a single layer. Place back in the oven to bake 5 minutes.
While the chicken is baking, in the same bowl you mixed the potatoes in, add 1 lb green beans, 1 Tbsp olive oil, 1 Tbsp grated parmesan cheese (optional), ½ tsp salt and ¼ tsp ground black pepper. Toss the seasonings together with the green beans.
Once the potatoes and chicken have cooked 5 minutes, remove from the oven and arrange the green beans in the last section. Place back in the oven to cook an additional 20-25 minutes, or until the potatoes are tender and chicken is fully cooked reaching 165F internally with a meat thermometer.