To Poach Sausages......Defrost the sausages. Do not break the skin or the links. Boil a pan of water, once boiled take it from the heat. Add the defrosted sausages, make sure they are fully submerged, put a lid on and leave for 7 mins. Now the sausages are cooked through. You can just fry at a high temp to add colour and flavour. You can also put them in the fridge and reheat them later.
To oven cook Sausages..... Defrost then put in the oven 200c 25-30 mins. This option is quite nice when making bangers and mash because although it dries them out a little it also makes them a bit crunchy on the outside which goes nicely with gravy