Preheat your oven to 425°F. Line a baking sheet with parchment paper.
Peel and cube the sweet potato into 1-inch pieces. Toss with a pinch of salt, pepper, and half the olive oil, then spread out on the baking sheet.
Trim the green beans and drizzle with a tiny bit of olive oil, salt, and pepper. Arrange them next to the sweet potatoes on the baking sheet.
Roast the sweet potatoes and green beans in the oven for about 20-25 minutes, or until tender and slightly crispy.
Meanwhile, season the chicken breast with salt and pepper. In a skillet over medium heat, heat the remaining olive oil and add the minced garlic. Sauté until fragrant, about 1 minute.
Add the chicken breast to the skillet and cook for 5-6 minutes per side, until fully cooked and golden.
Once the chicken is cooked, remove from heat and stir in the Greek yogurt to create a creamy garlic sauce. Adjust seasoning if needed.
Plate the chicken with a serving of roasted sweet potatoes and green beans. Drizzle any extra sauce from the skillet over the chicken and vegetables.
Serve immediately and enjoy your balanced, nutritious meal.