3 tbsp butter
1 small onion, finely chopped
3 tbsp flour, level
1/2 tsp paprika
1/2 tsp dry mustard
3 beef or chicken cubes, crushed
2 1/2 cups milk
1 1/2 cups water
2 cups grated Cheddar cheese
fresh parsley

Melt the butter and stir fry the onion until golden.
Add paprika, mustard and the cubes.
Add flour and stir continuously until it acquires some colouring.
Add gradually milk and water. Stir continuously until it starts boiling.
Remove from fire, add cheese and stir until melted.
Garnish with parsley and serve hot with crackers.