Wash the tomatoes thoroughly and dice them.
Finely chop the onion and garlic.
Heat olive oil in a pot and sauté the garlic and onion.
Add the tomatoes and sauté together.
Pour in water and chicken stock, then bring to a boil.
Season with salt and pepper.
Blend smoothly with a hand blender.
Serve in a bowl and garnish with basil or parsley.