Here, butternut squash adds some subtle sweetness as a counterpoint to the sharp tang of cheddar and gruyere in this dish. Prepare to see your dinner guests’ jaws drop when you tell them the secret ingredient. Mac and Cheese with Butternut Squash and Ham Go to recipes By Stonyfield American Main DishesHere, butternut squash adds some subtle sweetness as a counterpoint to the sharp tang of cheddar and gruyere in this dish. Prepare to see your dinner guests' jaws drop when you tell them the secret ingredient. Ready In: 1 hour 45 minutes Level: Easy Prep: 20 minutes Cook: 1 hour 15 minutes Yields: 10 Servings Print RecipeIngredients1 small butternut squash (about 1 1/4 pounds, peeled, seeded, and cut into 1-inch cubes, about 3 1/2 cups )1 1/4 c low sodium chicken broth1 lb penne pasta3 T unsalted butter4 T flour1 1/4 c Stonyfield Organic 2% Milk (warmed)4 oz shredded extra-sharp cheddar cheese (about 1 1/2 cups)3 oz shredded Gruyere cheese (about 1 cup)3/4 c Stonyfield Organic Whole Milk Plain Yogurt3/4 t salt1/2 t black pepper1 t nutmeg1/8 t cayenne pepper1 slice ham (about 6 ounces, 1/2-inch-thick cut into 1/4-inch pieces)2 T bread crumbs1 T grated Parmesan cheesedirectionsStep 1Heat oven to 375°. Combine squash and broth in a medium-size saucepan; bring to a boil over high heat. Reduce heat to medium; simmer until squash is tender when pierced with a fork, about 20 minutes. Remove from heat and mash contents of saucepan; set aside.Step 2Meanwhile, bring a large pot of salted water to a boil. Add penne and cook for about 11 minutes or until al dente. Drain, reserving 1 cup pasta water, and transfer to a large bowl; set aside.Step 3Melt butter in a medium-size saucepan over medium-high heat. Whisk in flour and cook for 1 minute or until pale yellow, whisking constantly. Gradually add milk to saucepan, whisking constantly until sauce thickens. Reduce heat to low and stir in cheeses; continue stirring until cheese is completely melted. Remove from heat and allow to cool for 8 minutes. Stir in squash mixture, yogurt, salt, pepper, nutmeg, cayenne and ham.Step 4In a large bowl, stir together pasta and cheese sauce, adding reserved pasta water by the 1/4-cupful if needed to loosen sauce.Step 5Lightly coat a 13 x 9-inch baking dish with nonstick cooking spray. Transfer pasta mixture to dish. Sprinkle with breadcrumbs and Parmesan and spritz topping with nonstick cooking spray.Step 6Cover with foil and bake at 375° for 20 minutes. Remove foil, and continue baking for about 35 minutes or until lightly browned on top. Serve immediately.