Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Peel and dice the sweet potato into half-inch cubes, then toss with half of the olive oil and a pinch of sea salt.
Spread the sweet potatoes on the baking sheet and roast for 20-25 minutes until they are tender and the edges are crispy.
Season the chicken breast evenly on both sides with the remaining sea salt, black pepper, garlic powder, and dried oregano.
Heat the remaining olive oil in a stainless steel or cast-iron skillet over medium-high heat.
Place the chicken in the skillet and sear for 6-7 minutes per side, or until the internal temperature reaches 165°F and the surface is golden brown.
While the chicken rests, slice the cucumber and halve the cherry tomatoes, combining them in a small bowl.
Plate the seared chicken alongside the roasted sweet potatoes and the fresh vegetable salad.
Crumble the Bellagio cheese over the warm chicken and sweet potatoes just before serving to allow it to soften slightly.