Peel shallots and garlic (halve onions). Boil up vinegar, 100 ml water, oil, lemon juice, salt and sugar. Add shallots, garlic cloves and peppercorns. Cover and simmer for about 5 minutes. Clean and wash the tomatoes and prick them several times with a wooden skewer.
Wash the basil and pluck off the leaves. Pour tomatoes and basil into a prepared glass. Pour hot stock over it until everything is covered. Close the jar tightly. Let the tomatoes stand for at least 2-3 days.
Shelf life approx. 5 weeks