Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Peel and cube the sweet potato into 1-inch pieces, then toss with 1 teaspoon of olive oil and a pinch of sea salt and black pepper.
Roast the sweet potatoes for 20-25 minutes until they are tender and the edges are golden brown.
Season the chicken breast on both sides with the garlic powder and the remaining sea salt and black pepper.
Heat the remaining 1 teaspoon of olive oil in a skillet over medium heat and sear the chicken for 6-7 minutes per side until fully cooked through.
Remove the chicken from the pan and set it aside to rest.
Add the corn kernels and chicken broth to the same skillet, scraping the bottom of the pan to release the flavorful browned bits.
Simmer the corn for 3 minutes, then remove the skillet from the heat and stir in the Greek yogurt until a smooth, creamy sauce forms.
Slice the chicken breast and plate it next to the roasted sweet potatoes.
Drizzle the creamy corn sauce over the chicken and garnish with fresh chives before serving.