Preheat oven to 400 degrees F.
Line a baking sheet with parchment paper and set aside.
In a medium-sized bowl, mix together melted butter, olive oil, broth and minced garlic. Set aside.
Place chicken breasts in the centre of lined baking sheet. Surround chicken breasts with potatoes.
Pour sauce evenly over chicken and potatoes and bake in the oven for 10 minutes.
As the chicken and potatoes bake, chop onions and chop stems off from each asparagus stem.
Once time is up, remove chicken and potatoes from the oven. Flip chicken over. Add onions and asparagus on the baking sheet, surrounding the chicken and potatoes.
Bake for an additional 15 minutes.
Remove from oven and serve.