Clean, wash and cut the vegetables into small cubes. Cook the vegetables, except the tomatoes, in a little salted water for about 5 minutes. Peel the garlic. Bring vinegar, 1/4 litre water, 2 teaspoons salt, sugar, garlic, herbs and spices to the boil.
Stir in the preserving agent. Pour the cooked vegetables and tomatoes into glasses and pour the stock over them. Add olive oil. Close the jars when cold.