Farmer's omelet

Melt butter and cook the small-diced potato a couple of minutes until coloured and tender.

Add diced onion and sausage, breaking the sausage up, and cook through.

Add the egg and spread it to the edges; pull the edges away and tilt so uncooked egg runs behind.

After about 15 seconds add white cheddar, fold over, flip and cook 30 seconds or so; out.