Start by preheating your oven to 350°F (175°C). This will prepare the perfect environment for your casserole to bake evenly and beautifully.
In a skillet, season the chicken breasts with olive oil, salt, and pepper. Cook over medium heat until they are golden and cooked through, about 6-7 minutes per side. Once done, allow them to rest briefly before shredding the meat into bite-sized pieces.
In a large mixing bowl, combine the Greek yogurt, mayonnaise, Dijon mustard, minced garlic, hot sauce, paprika, and a pinch of salt and pepper. Stir until you have a smooth, creamy mixture.
Toss the shredded chicken and crispy bacon bits into the mixture. Add the grated cheddar cheese, chopped chives, and your choice of nuts. Fold everything together gently until just combined.
Transfer the mixture into a greased casserole dish. Spread it evenly. Bake in the preheated oven for 25-30 minutes, or until bubbly and golden on top.
Once cooked, let it cool for a few minutes. This allows the flavors to meld. Serve warm, and enjoy the deliciousness.