Clean, wash and finely chop the spring onions. Peel and crush garlic. Fry both in 2 tbsp. hot oil.
Add the lentils and steam briefly. Add just under 1 1/2 l water and 1-2 tsp salt. Bring everything to the boil. Cover and simmer for about 10 minutes
Lenses may need to be drained. Then season with vinegar, salt, pepper and sugar. Mix in 6 tablespoons of oil. Let it cool down. Wash and finely chop the basil and add to the salad.