Preheat oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Peel the sweet potato and cut it into 1/2-inch thick fries.
In a bowl, toss the sweet potato fries with olive oil, half the sea salt, and half the garlic powder.
Spread the fries in a single layer on one side of the baking sheet and bake for 15 minutes.
In a small bowl, whisk together the Dijon mustard, honey, black pepper, and remaining sea salt and garlic powder.
Coat the chicken tenderloins in the honey-mustard mixture.
Remove the baking sheet from the oven, flip the fries, and place the chicken on the other side.
Return to the oven and bake for another 12-15 minutes until the chicken is cooked through and the fries are golden.