Wash the quinoa in a sieve and boil with twice the amount of water for about 15 minutes. Boil the broccoli in a little salted water for about 8 minutes.
In the meantime, wash the lamb`s lettuce, tomatoes and cucumber. Halve the tomatoes and slice the cucumber.
Peel the sweet potato and cut into small cubes. Boil the sweet potato cubes in salted water for about 5 minutes.
For the raspberry and mustard dressing, stir together the maple syrup, water, mustard and rapeseed oil. Stir in the raspberry vinegar and salt.