Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Wash and dice the potato into uniform 1/2-inch cubes to ensure even roasting.
Slice the chicken breast into bite-sized pieces, approximately the same size as the potato cubes.
Mince the fresh garlic cloves, rosemary, and thyme finely.
In a large mixing bowl, combine the chicken, potatoes, minced garlic, herbs, sea salt, black pepper, and olive oil.
Toss the mixture thoroughly until every piece of chicken and potato is well-coated in the oil and seasonings.
Spread the mixture in a single layer on the prepared baking sheet, ensuring pieces are not overcrowded.
Roast for 25 to 30 minutes, tossing the ingredients halfway through with a spatula, until the potatoes are golden-brown and the chicken is cooked through.
Remove from the oven and drizzle with fresh lemon juice before serving warm.