Preheat the oven to 400°F (200°C).
Cut the chicken into bite-sized pieces. Season with salt and pepper.
Add butter or oil to a large skillet and fry the chicken pieces in batches over medium-high heat until golden brown.
Combine pesto and heavy cream in a bowl.
Place the fried chicken pieces in a baking dish together with olives, feta cheese, and garlic. Add the pesto/cream mixture.
Bake in oven for 20-30 minutes, until the dish turns bubbly and light brown around the edges.
