Please let us know your results T99.
The onions are larger than average and seem less acidic and milder. They remind me of very large pink shallots but round shape. I would be very happy to use them in a very wide variety of cooking.
My thought is that you don't have to cook them out for as long as other onions to get the sweetness come through so are ideal for a quick curry.
However, I used Extra Hot Chilli Powder and Extra Hot Madras Powder in combination for the first-time too and the results were great. It had a BIR taste even without using a base gravy.
I wasn't aiming to recreate any particular curry and just did my own thing:
Very large Pink Curry Onion finely chopped
Tomato puree
1 large chopped tomato
Water
Extra Hot Chilli Powder
Extra Hot Madras Powder
Tumeric
1 Cardamon Pod split open
1 Clove
1 Bay leaf
Frozen Garlic block
Frozen Ginger block
black onions seeds
Fenugreek powder
Cumin seeds
Frozen mixed veg (it costs less than a quid for a 1Kg bag in Asda)
A very small bit of white cabbage
Can of drained chick peas
Some frozen spinach
Total cost probably less than ?1.50 for 4 good sized portions.