In a mixing bowl, combine the plain Greek yogurt, 1 teaspoon kosher salt, and ½ teaspoon pepper to prepare the marinade.
Add the thinly sliced chicken breasts to the marinade, ensuring each piece is well-coated. Marinate for at least 30 minutes or up to 2 hours in the refrigerator.
Preheat your oven to 375°F (190°C) to ensure even cooking and a golden-brown crust.
In a food processor, pulse the sliced almonds until coarsely chopped, creating a crunchy texture without turning into flour.
Heat 1 teaspoon olive oil over medium heat in a skillet. Add the chopped sweet onion and sauté until translucent, about 3-4 minutes. Stir in minced thyme and season with ¼ teaspoon kosher salt and pepper to taste.
Remove the chicken from the marinade, letting excess drip off. Dredge each piece in the chopped almonds, pressing gently to adhere.
Place the almond-coated chicken on a baking sheet lined with parchment paper. Bake for 25-30 minutes until fully cooked and almonds are golden brown.
While baking, combine cherry preserves and balsamic vinegar in a small saucepan. Heat on low, stirring until preserves melt and sauce is combined.
Remove chicken from oven and let rest for a few minutes. Serve drizzled with warm cherry sauce. Enjoy with vegetables or salad for a complete meal!