Ham & cheese croquetas - Good Food Middle East

Ingredients

• 25g butter
• ½ small onion, finely chopped
• 50g plain flour
• 250ml milk
• 140g sliced smoked ham, diced
• 50g mature cheddar, coarsely grated
• 50g Gruyère, finely grated
• 1 tsp Dijon mustard
• 2 tbsp double cream
• 2 large eggs
• 140g fine dried breadcrumbs
• sunflower oil, for deep frying
• 300g ripe tomatoes, roughly chopped
• 1 long red chilli, finely chopped (deseeded if you don't like it too hot)
• 1 small red onion, finely chopped
• 4 large garlic cloves, crushed
• 100g demerara sugar
• 100ml red wine vinegar