Peel tomatoes: Blanch, shock, peel, and chop.
Rest tomatoes + onions with salt 12–24 hours. Drain.
Cook tomatoes, onions, garlic, vinegar for 20 mins.
Toast spices dry, crush lightly.
Add spices, paprika, pepper. Simmer 5 mins.
Stir in sugar. Simmer uncovered ~30–40 minutes until thick.
Add cornflour slurry if needed. Simmer 5 more minutes.
Jar hot, seal, cool. Rest a few days before diving in
