Put vinegar and oil in a bigpot. Bring to boil and add all veggies but bell peppers, olives, mushrooms
Boil 10 minutes. Add bell peppers. Boil 10 min. Add olives and mushrooms. Add tuna. Mix well
Put ketchup, salsa and tomato paste in an other pan. Boil 10 minutes. Add to vegetables mix
Put in sterilized jars. Put the jars in pan with boiling water. The water must be 1 inch over the jars. Let boil 15 min. In an other one, put ketchup, tomato paste and salsa. Boil 10 minutes.
