Might do it -
3 tbsp golden syrup
100 g self-raising flour
50 g shredded suet
50 g caster sugar
1 egg
2 tbsp water
4 tbsp milk
2 drops vanilla essence
Pour the golden syrup in the bottom of a lightly greased m/wave proof (glass, ceramic or plastic ) 900 ml basin.
Mix the flour, suet and sugar together to a smooth batter then add the egg, water, milk and vanilla essence. Make sure no lumps....
Spoon the mixture on to the syrup in the basin.
Set the microwave at maximum (full). Cover the basin with m/wave suitable cling film and cook for 2 minutes.
Remove the cling film and turn the basin round.
Cook for a further 2 minutes.
Leave the pudding to stand for 2 minutes before turning out and serving. Lashings of hot custard........and more syrup...& warm the syrup to make it pour more easily or just use a hot spoon - run it under hot water for example....
This assumes a 700w 'normal' domestic m/wave oven by the way, so adjust if yours is different.
But suet puds should really be steamed......