Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Dice the russet potato into 1/2-inch cubes and toss them on the baking sheet with half of the olive oil, sea salt, and black pepper.
Roast the potatoes for 20-25 minutes, flipping halfway through, until they are golden and crispy on the outside.
While the potatoes roast, slice the chicken breast and red bell pepper into thin, even strips.
In a small bowl, whisk together the remaining olive oil, minced chipotle peppers, garlic powder, and lime juice to create a marinade.
Toss the chicken strips and bell peppers in the chipotle marinade until thoroughly coated.
Heat a large cast-iron skillet over medium-high heat and add the chicken and peppers in a single layer.
Sear the chicken for 3-4 minutes per side until fully cooked through and slightly charred.
Plate the spicy chipotle chicken and peppers alongside the crispy roasted potatoes and serve immediately.