Preheat a skillet over medium heat.
Season the 5 oz chicken breast with salt, pepper, and a sprinkle of chopped garlic.
Cook the chicken in a non-stick pan over medium heat until fully cooked through, about 5-7 minutes per side. Set aside and keep warm.
Peel and cube the sweet potato. Boil or steam until tender, about 10-15 minutes.
Thinly slice the half onion. In the same skillet, add 1 tsp olive oil and sauté the onions over low-medium heat until they are soft and caramelized, about 8-10 minutes.
Drain the sweet potatoes and mash them with a fork. Stir in a pinch of salt, a little pepper, and incorporate half of the caramelized onions for a sweeter, savory mash.
For the creamy herb sauce, combine the 1/4 cup non-fat Greek yogurt, 2 tbsp chopped fresh herbs, the remaining garlic (minced if desired), salt, and pepper in a small bowl. Mix until smooth.
Plate the sweet potato mash and top with slices of the chicken breast. Drizzle with the creamy herb sauce and garnish with the remaining caramelized onions.
Serve warm and enjoy your balanced, protein-packed meal.