2 onions, sliced
2 sprigs fresh thyme, leaves only
75g/3oz beef dripping
1 tbsp instant gravy granules
225g/8oz plain flour
1 tbsp yeast extract
salt and freshly ground black pepper
1 tbsp olive oil
400ml/14fl oz vegetable stock
50g/2oz butter
8 free-range eggs
570ml/1 pint milk
6 beef sausages