1. Wash and finely slice the leeks. Chop the shallot.
2. Sauté the chorizo slices in a hot pan, without any fat, for 1 minute. Set aside.
3. Cook the red lentils for 12 minutes in boiling water.
4. Heat the olive oil in the pan used to cook the chorizo.
5. Add the leeks and shallot, then cook for 10 minutes over medium heat, covered, stirring regularly.
6. Drain the lentils.
7. Cut the chorizo into cubes.
8. Mix the leek fondue, chorizo, and lentils. Season with pepper, sprinkle with chopped chives, and enjoy.