Squeeze the sausage from it casing and fry in a pan while mashing the sausage into small bits. Remove from the pan.

Melt the butter and fry the onion and garlic until tender, about 5 minutes. Add the flour and stir until smooth. Cook for about a minute whilst stirring furiously. Gradually add the milk and continue stirring until thickened. Add the cheese and stir until melted. Remove form heat, stir in sausage and beer, a pinch of salt and some smoked paprika to taste.

Keep warm on low heat.