Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Dice the Yukon Gold potato into 1/2-inch cubes to ensure they cook quickly and develop crispy edges.
In a medium bowl, toss the potato cubes with the extra virgin olive oil, minced garlic, dried rosemary, sea salt, and black pepper until well coated.
Spread the potatoes in a single layer on the prepared baking sheet and roast for 20 minutes, flipping once halfway through.
While the potatoes roast, trim the woody ends off the asparagus spears.
After 20 minutes, move the potatoes to one side of the tray and add the asparagus to the other side, tossing them slightly in the residual oil on the pan.
Return the tray to the oven and roast for an additional 10-12 minutes until the potatoes are golden-brown and the asparagus is tender-crisp.
During the last 5 minutes of roasting, gently warm the sliced rotisserie chicken breast in a skillet over low heat or in the oven.
Plate the chicken alongside the roasted garlic potatoes and asparagus, finishing the dish with a bright squeeze of fresh lemon juice.