Easy Cheeseburger Quiche

Ingredients (13 items)

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• 1 tablespoon oil
• 1 large onion, chopped
• 1 pound ground beef
• 1 teaspoon meat seasoning, or to taste
• 1 pinch garlic powder, or to taste
• 1 pinch herbes de Provence, or to taste
• salt and ground black pepper to taste
• 4 eggs
• ½ cup skim milk
• ½ cup mayonnaise
• 2 tablespoons all purpose flour
• 1 ¼ cups shredded sharp Cheddar cheese
• 1 pastry for a 9-inch deep dish pie crust