Wash the quinoa and then bring to the boil with the water. Simmer over low heat until the water has evaporated. Put the quinoa in a kitchen sieve and let it drain on 2 to 3 layers of kitchen paper.
In the meantime, cut the tomatoes in half, cut the peppers into small pieces and the spring onions into rings. Cut the feta into cubes.
Put the frozen peas in a bowl and mix with the oil and spices. Add the hot quinoa and mix well. Let cool and add the vegetables and feta. Fold in everything and season to taste.
Ideal as a party salad or as a side dish for grilling.