Welsh Rarebity
In a double boiler, slowly melt cheese.
Combine warm beer and egg yolk.
Slowly add beer/egg mixture to cheese, and stir in.
Once cheese mixture is smooth, add cayenne pepper, dijon mustard, salt, and optional marmite, and stir until smooth.
Toast the bread. Pour cheese mixture over toast and tomato slices, and serve.
Serves: 1-2
Preparation time: 15 min