2 tbsp sour cream or crème fraîche
salt and freshly ground black pepper
½ tsp Worcestershire sauce
½ tsp Dijon mustard
4 slices white sandwich bread, buttered
2 thin slices deli ham

Here’s a great halogen recipe from Paul Brodel & Carol Beckerman.
Their book, containing more than 100 delicious Halogen recipes, entitled “The Halogen Oven Cookbook”, is available through the Amazon link down the page to the right in our sidebar.
Method
The traditional French ham and cheese sandwich is ideal for cooking in the halogen oven. It will be crisp and golden on the outside and succulent on the inside.
In a small bowl, mix the cheese with enough cream or crème fraîche for it to hold together. Add the seasoning, Worcestershire sauce and mustard, and mix until combined.
Place 2 slices of bread butter-side down on the oven tray. Divide the cheese mixture between them, and spread it right to the edges.
Add the deli ham, cutting it to fit, if necessary. Cover with the other 2 slices of bread, butter-side up, to make 2 sandwiches. Press down lightly.
Place the oven tray on the high rack of the halogen oven and cook at 200°C (400°F) for 3-4 minutes. Turn the sandwiches over and cook for 3-4 minutes more, or until golden brown on the outside and melting on the inside.
Another Way
To make a Croque Madame, add a fried egg to the sandwich just before cooking.
Source: “The Halogen Oven Cookbook”, Paul Brodel & Carol Beckerman