Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Scrub the potatoes thoroughly and dice them into uniform 1/2-inch cubes to ensure even roasting.
Cut the chicken breast into small, bite-sized pieces that will cook at the same rate as the potatoes.
In a large mixing bowl, toss the diced potatoes and chicken with 1 tablespoon of olive oil, sea salt, black pepper, garlic powder, and smoked paprika.
Spread the chicken and potato mixture in a single layer on the prepared baking sheet and roast for 20-25 minutes until the potatoes are golden and crisp.
While the oven does the work, steam the frozen mixed vegetables (peas, carrots, cauliflower, and broccoli) until they are tender and vibrant.
Toss the steamed vegetables with the remaining 0.25 tablespoon of olive oil to add a silky finish.
Assemble your bowl by combining the roasted chicken and potatoes with the steamed vegetables and serve while hot.