"This simple five ingredient pasta casserole recipe for Chicken Manicotti tastes like you spent all day cooking...."
INGREDIENTS
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2 tablespoons olive oil
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1 onion, chopped
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28-ounce jar spaghetti sauce
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1 teaspoon garlic salt
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1 teaspoon dried Italian seasoning
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1-1/2 pounds boneless, skinless chicken thighs
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14 uncooked manicotti shells
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1/2 cup water
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2 cups shredded mozzarella cheese