Spinach-Artichoke Gratin

• 2 cups chopped yellow onion
• 2 tablespoons all-purpose flour
• 1 1/4 cups milk
• 3/4 cup (3 oz.) freshly shredded Parmesan cheese
• 1/4 cup HELLMANN'S or Best Foods Real Mayonnaise
• 1/2 (14-oz.) can artichoke hearts, drained and quartered
• 1 teaspoon salt
• 1/4 teaspoon freshly ground pepper
• 2 (10-oz.) packages frozen spinach, thawed and well drained

1. Preheat oven to 425u0b0. Saute onions in a lightly greased large nonstick skillet over medium heat 6 minutes or until tender. Add flour, and cook, stirring constantly, 30 seconds to 1 minute. Add milk; cook, stirring frequently, 2 to 3 minutes or until thickened. Remove from heat.
2. Stir in 1/4 cup Parmesan cheese and next 4 ingredients. Add spinach, and stir until thoroughly combined. Transfer spinach mixture to a lightly greased 8-inch square baking dish. Sprinkle with remaining 1/2 cup Parmesan cheese.
3. Bake at 425u0b0 for 15 minutes or until cheese is melted and mixture is bubbly. Let stand 5 minutes before serving.

yellow onion, flour, milk, parmesan cheese, hellmanns, hearts, salt, freshly ground pepper, frozen spinach

Taken from www.myrecipes.com/recipe/spinach-artichoke-gratin (may not work)