Step one:

Warm the ale in a small saucepan and put to the side.

Step two:

In another saucepan, melt the butter until it starts to foam, then add the flour and stir for one minute.

Step three:

Bit by bit add the warmed ale whisking constantly to create a thick sauce. Add the cheese and whisk again until it becomes a paste.

Step four:

Stir in the mustard, Worcestershire and chives.

Step five:

To bring the dish together, heat your grill to its highest setting.

Step six:

Grill the sourdough slices on one side until golden.

Step seven:

Flip them over and spread on the cheesy sauce.

Step eight:

Put back under the grill and cook again for a couple of minutes until everything is bubbling and golden. Enjoy!