Macaroni and Cheese w/ Tomatoes

Macaroni and Cheese with Tomatoes Sarah's Cucina Bella serves 4 1 tbsp salted butter1 1/2 tbsp all-purpose flour1 cup nonfat milk1 cup shredded sharp Cheddar cheesezest of 1/2 lemon (optional)kosher salt and black pepper1/2 lb pasta, cooked1 14.5 oz can diced tomatoes, drained Melt the butter over medium heat in a medium saucepan. Whisk in the flour and cook until it forms a smooth paste (about 1 minute). Next, whisk in the milk. Cook for 3-4 minutes, whisking constantly, until thickened. Whisk in the cheddar cheese and lemon zest (if using). Remove from heat and season with salt and pepper. In a large bowl, combine the pasta and cheddar sauce. Stir well. Add the tomatoes in and stir well. Serve immediately.