Spinach Mac & Cheese
Preheat oven to 400°F (200°C). Cook macaroni according to package instructions. Meanwhile, heat oil in a large saucepan over medium heat. Stir in flour and cook for 1 min. without browning.
Stir in half the milk to form a smooth paste. Add the remaining milk, stirring constantly until bubbles appear around the edges of the surface (do not boil). Add the cheese, mustard, Worcestershire and salt; stir just until combined. Keep warm over lowest heat, stirring occasionally until pasta is ready. Drain pasta well.
Mix cooked spinach into the sauce and turn off heat. Add pasta, mix well and transfer to an 8-in. (2 L) square baking dish. Bake for 5 min., remove from oven, top with crouton crumbs and serve.