Viili is a yogurt-like mesophilic fermented milk that originated in the Nordic countries.
Viili is a traditional heirloom yogurt from Finland.
  
It is a dish of seasoned, strained or diluted yogurt, eaten throughout the former Ottoman countries.
It is similar to tarator in Balkan cuisine.
It is made of salted strained yogurt or diluted yogurt mixed with cucumbers, garlic, salt, olive oil, sometimes with vinegar or lemon juice, and some herbs like dill, mint, parsley, thyme etc.