Put the chickpeas in a sieve, rinse and drain. Mix 1 tsp. each of cinnamon, cumin, coriander, paprika, 1 1⁄2 tsp. salt and oil. Dab chick peas dry between two layers of kitchen paper.
Mix with the seasoning mixture in a bowl.
Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Line baking tray with baking paper. Wash sweet potatoes thoroughly and cut in half lengthwise. Place them on the baking tray with the cut surface facing upwards.
Spread the chickpeas all around the baking tray. Spread the remaining seasoning mixture from the bowl on the potatoes with a baking brush. Cook in the hot oven for about 1 hour.
For the sauce, peel the garlic, chop it coarsely and crush it into a paste with a fork. Mix tahini, garlic, lime juice and almond drink. Season the sauce with salt, pepper and sugar. Wash the dill and shake dry.
Cut one half finely and stir into the sauce. Chop the remaining dill coarsely. Wash and halve or quarter the tomatoes.
Remove the tray from the oven. Arrange sweet potatoes, chickpeas, tomatoes and some sauce, sprinkle with dill. Add the rest of the sauce.