Fry sausages in a little olive oil until golden. Add a little knob of butter for the last minute to brown. Put the sausages in a medium oven to keep warm.
Drain oil from the sausage pan and add onions, salt, pepper and thyme. Fry until starting to brown and add beef stock. Reduce on high heat for 3-4 minutes. Add a little knob of butter to thicken.
Brush potato bread with olive oil and fry in a hot dry pan. (About 1 minute either side).
Stack sausage onto potato bread and drizzle the onion gravy around. Quick, simple and a very tasty dinner!