This is more like a thick pea casserole than a soup and as well as being a traditional Romanian dish, it is very easy to make. Use tinned peas as the frozen ones are too sweet.
For 2 people I used:
Heat the oil in a saucepan, add onion and cook for 2-3 minutes. Then add 1 cup water and the stock cube and continue coking for another 10 minutes. Add the peas and the herbs and let simmer for 10-15 minutes. (If the herbs are fresh, sprinkle them on top, just before serving).
This is a vegetarian dish.