Rye Burger with Classic Cheese Sauce

Method

1. Preheat grill or pan to medium-high heat.
2. Cook ground beef patty to desired doneness.
3. Melt butter in a saucepan, add flour, then gradually add milk and cheese to make a smooth sauce.
4. Toast rye bun halves.
5. Assemble burger with patty, cheese slice, lettuce, tomato, pickles, and sauce.
6. Add mayo and ketchup to taste.
7. Check that the ground meat reaches 71°C (160°F) throughout before serving.