Peel and roughly chop 1 medium onion and place in the food processor. Process the onion until it is finely chopped.
Crush the ½ tsp of black peppercorns and the ½ teaspoon of coriander seeds in a mortar and pestle or a spice grinder. Crush until coarse rather than finely ground. Add to the food processor.
Peel and roughly chop the two cloves of garlic. Put them with 1 tsp sea salt into the mortar and pestle and crush to a paste. Add to the food processor.
Roughly chop the 100 g (4 oz) streaky bacon and add to the food processor.
Finely shred the 8 fresh sage leaves. Roughly chop the 2 tsp of fresh oregano and 1 tsp fresh thyme leaves. Add the herbs to the food processor.
Add the 350 g (12 oz) pork sausagemeat to the food processor in small pieces.
Whisk together the 4 tbsp sherry and 2 tbsp brandy and 1 medium egg. Pour into the food processor with the other ingredients and process until all the ingredients are combined.
Fill an ovenproof dish or casserole with the pork sausagemeat mixture and smooth the top.
Cover the dish with foil, and a lid if you have one, then stand in a roasting tin (pan) half filled with boiling water. Cook in the oven at 160 C/325 F for 1½ hours.
Remove from the oven and leave to cool for 1 hour.
Place a piece of parchment paper over the pate, then cover with a saucer or small plate.
Place a weight onto the saucer and place the pate in the fridge for at least 4 hours and preferably overnight.
Decorate the top of the pate with fresh sage leaves and serve as an appetiser with crusty bread or as part of buffet or deli board.