Baked Penne and Cheese with Spinach

Instructions

3 cups penne or 3 cups other tubular pasta 6 ounces fresh baby spinach leaves, washed,uncooked 4 tablespoons butter 1 medium onion , chopped 1 lb sliced mushrooms 1/4 cup flour 2 cups milk 2 cups sharp chedd [...]

Read the recipe at food.com

Difficulty Level: Hard