Preheat your oven to 400°F (200°C).
Dice the russet potato into 1/2-inch cubes and place them in a bowl.
Toss the potatoes with 0.75 tsp of olive oil, the garlic powder, the onion powder, and a pinch of the sea salt.
Spread the potatoes in a single layer on a parchment-lined baking sheet and roast for 25-30 minutes until crispy and golden.
While the potatoes roast, whisk together the chipotle peppers in adobo, lime juice, and the remaining sea salt and black pepper in a small bowl.
Coat the chicken breast thoroughly with the chipotle marinade.
Heat the remaining 0.75 tsp of olive oil in a cast-iron skillet over medium-high heat.
Place the chicken in the skillet and sear for 6-7 minutes per side until the internal temperature reaches 165°F.
Remove the chicken to rest, then add the sliced red bell pepper to the same skillet, sautéing for 3-4 minutes until tender-crisp.
Serve the sliced chipotle chicken alongside the crispy roasted potatoes and sautéed peppers.