Quick microwave orange pudding, gluten and dairy free

Continuing my testing of puddings in the microwave (cheaper, quicker and easier) I made one with some fragrant zingy oranges.   Unfortunately not straight from a tree- yet another year where I haven't made it to Seville for the orange season.  I don't think this recipe is quite right yet - if anyone makes a variation on it that works well perhaps you could let me know.

I based the recipe on this recipe for self-saucing orange pudding.

Ingredients
zest one orange
juice 5 oranges (approx 250ml) - 40ml for batter, rest for sauce
100g self raising flour (40% urid, 40% tapioca, 20% cornmeal plus 1 rounded tsp baking powder)
80 g sugar - 40g for batter, 40g for sauce
40ml oil
1 egg

Mix the zest, oil, egg, 40g sugar and 40ml juice together.  Mix in flour.  Place batter in microwave safe bowl.

Mix remaining juice and sugar together.  Heat to dissolve sugar then bring to the boil.  Pour carefully over the pudding; it looks weird but that's what you do.

Cover in clingfilm, and cook on medium for 8 minutes.  Leave to sit for a few minutes, covered.

This pudding is quite fluffy but has a texture which reminds me slightly of dumplings.  The original recipe asked for melted butter, and a larger amount, which might have given a better texture.

Tastes good, worth doing again.