Rosmerta's Recipes - Spiced Rice with Kippers and Poached Eggs

• 2 plump kippers, about 650g/1lb 7oz total weight
• 2 tsp whole coriander seeds
• 2 tsp whole cumin seeds
• 1/2 tsp black peppercorns
• seeds from 2-3 cardamom pods
• a good pinch of saffron threads or 1/4 tsp tumeric
• 1 dried red chilli or 1 tsp crushed chilli flakes
• 2 tbsp olive oil
• 50g butter
• 1 medium onion, chopped
• 225g basmati rice
• 600ml fish stock or water
• 1-2 tbsp chopped fresh coriander
• 4 eggs