Clean and wash the spinach. Clean, wash and cut the pointed cabbage into large pieces. Clean, wash and cook the beans in boiling salted water for 8-10 minutes. Approximately 4 minutes before the end of the cooking time, add the spinach and pointed cabbage to the beans.
Drain, rinse under cold running water and drain well.
Roast the hazelnuts in a pan without fat. Remove from the pan and allow to cool. Cut bacon into small pieces. Heat 1 tablespoon of oil in a frying pan. Leave the bacon in it on both sides for 3-4 minutes.
Remove the pan from the stove. Drizzle bacon with maple syrup. Put chickpeas in a sieve, rinse and drain.
Season vinegar with sugar, salt and pepper. Stir in 2 tablespoons of oil drop by drop. Mix blanched vegetables, chickpeas, hazelnuts, bacon and vinaigrette and pour into a lunch box.