Pesto Chicken Casserole with Feta Cheese and Olives
Ingredients:
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¾ pound skinless, boneless chicken thighs, cut into cubes
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¾ pound skinless, boneless chicken breasts, cut into cubes
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salt and ground black pepper to taste
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3 tablespoons butter, or as needed
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1 (8 ounce) package feta cheese, diced
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8 tablespoons pitted Kalamata olives
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1 clove garlic, minced
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1 ⅔ cups heavy cream
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1 (3.5 ounce) jar pesto