INGREDIENTS
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1 large head of broccoli (about 8 cups, and cut into large florets)
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1 1/2 cups mayonnaise
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1 1/2 cups sour cream
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1/4 cup melted butter
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1 -2 teaspoon garlic powder (or to taste)
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2 teaspoons seasoning salt
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1 teaspoon black pepper
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1 1/2 cups old cheddar cheese (cut into about 1/2-inch cubes or shredded)
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1 small onion, finely chopped
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1/2 cup parmesan cheese (or to taste)