This Broccoli Cheddar Mac & Cheese is a cozy, veggie-packed twist on the classic comfort food. Tender pasta and bite-sized broccoli florets are cooked together for ease, then coated in a rich homemade cheese sauce. The sauce begins with a buttery onion and garlic roux, thickened with flour, then blended with milk and sharp cheddar until creamy and smooth. Finished under the broiler with more cheddar and melted mozzarella, this dish is golden, gooey, and deeply satisfying.