1 pinch salt-free seasoning blend (such as Mrs. Dash), or to taste
•
1 pinch herbes de Provence, or to taste
Instructions
Preheat the oven to 350 degrees F (175 degrees C).
Sprinkle 1/4 cup Cheddar cheese into pastry shell. Mix together chicken, spinach, remaining 3/4 cup Cheddar cheese, and onion in a medium bowl; transfer mixture to pastry shell.
Whisk together eggs, half-and-half, mayonnaise, salt, black pepper, seasoning blend, and herbes de Provence in a second medium bowl until well combined; pour over chicken mixture.
Bake in the preheated oven until a knife inserted into the center comes out clean, 35 to 40 minutes. Let stand for 15 minutes before slicing and serving.