4 sticks celery, diced (optional)
2 garlic cloves, crushed
2 onions, roughly chopped
1 tbsp chopped thyme
2 tsp Dijon mustard
2 x 400g tins chopped tomatoes
12 lasagne sheets
2 level tbsp plain flour
50g/2oz plain flour
1 tbsp redcurrant jelly (optional) or 1 tsp caster sugar
150ml/录 pint beef stock
salt and freshly ground black pepper
2 tbsp olive oil
3 tbsp tomato pur茅e
50g/2oz butter
75g/3oz mature cheddar, grated
750ml/1录 pints hot milk
50g/2oz Parmesan, finely grated
900g/2lb beef mince