Nan Rose's Tomato Relish Recipe

I have copied word for word mums relish recipe as she wrote with her own hand 35 years ago. She got it from her mother who was making it for decades previous. I am guessing this is an old favorite from North Eastern Tasmania.

How to make tomato relish:
6 pounds ripe tomatoes
2 pounds onions
2 pounds sugar
2 tablespoons curry powder
1/2 teaspoon cayenne powder
3 tablespoons mustard powder
Vinegar to barely cover
Salt

Cut tomatoes, sprinkle with salt, let stand 12 hours
Slice onion in separate dish, sprinkle with salt, let stand 12 hours
Strain juice off onions only.
Place tomatoes and onions in pan and everything else except mustard and curry. Boil for 5 min. Mix mustard and curry with vinegar and boil 1 hour.

Before

After

Yield has been great at our veggie plot. My first batch of relish is with 4.5 kg of tomatoes. The tomatoes have taken an unusually long time to ripen this year. It has been a cooler than normal summer.