Prep 3 hrs
Cook 40 mins
- Gently stir salt into thin sliced tomatoes.
- Cover with ice cubes; let stand 2 hrs; until tomatoes are crisp and cold; add onions.
- Combine remaining ingredients and bring to a boil, boil for 10 minutes.
- Add tomatoes and onions and bring to boiling point.
- Pack at once in jars.
- Process in boiling water bath for 30 minutes.