1 (10 ounce) box frozen chopped spinach, thawed and well drained
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1 (10 ounce) can water-packed artichoke hearts, drained and chopped
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2 tablespoons finely chopped onion
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½ cup grated Parmesan cheese
Instructions
Preheat the oven to 350 degrees F (175 degrees C).
Blend mayonnaise, Swiss cheese, spinach, artichoke hearts, and onion in a food processor. Spoon into a baking dish.
Bake in the preheated oven for 25 minutes. Sprinkle Parmesan cheese over top and continue to bake until lightly browned and bubbly, about 25 more minutes.