Interland sponsored a Potluck luncheon, which finally gave me an excuse to buy one of Costco's 72 oz can's of Tuna. So, 84 ounces of Tuna later, 1 1/2 cups of butter, 12 cups of milk, 3 onions, 6 cups of mushrooms, 6 cups of green peas, 3/4 cup flour, 5 cups of shredded cheddar, and seasons to taste, we had enough sauce to mostly fill my largest stock pot. That's before adding the parsley, more butter, and 8 cups of cooked egg noodles.