1. Preheat oven to 350 degrees; prepare a 9X13 baking dish with cooking spray. 2. Beat eggs in mixing bowl; stir in onion, flour until flour is not lumpy. Stir in spinach, cottage and cheddar cheese, butter, salt and pepper until evenly combined; pour evenly in baking dish. 3. Bake until bubbly and top is golden brown; about 45 minutes.
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