Peel and finely dice the onion. Clean leek, halve lengthwise and cut into rings. Clean carrot and cut into fine cubes. Sauté onion, leek and carrot with butter in closed microwave dish at full power (at 500 W 6-8 min).
Stir the paradeis pulp into the vegetables, add the lentils and season with marjoram, salt, pepper, vinegar and sugar. Heat the lentil vegetables in a closed microwave dish at full power (at 500 W 8-10 min). Season the lentil vegetables with spices, serve.
Tip: Always use aromatic spices to refine your dishes!