Prepare the Vegetables: Peel the butternut squash and cut it into approximately 2 × 2 cm cubes. Halve the red onion and slice it thinly, then chop the garlic.
Prepare the Chickpeas: Rinse the pre-cooked chickpeas thoroughly if they come from a can or jar, then set them aside.
Toast the Almonds: Place the raw almonds in a dry pan and toast them until they begin to brown. Remove from the pan and set aside.
Prepare the Coriander: Chop the fresh coriander, keeping 1 tablespoon aside for the yogurt and the remainder for finishing the tagine.
Mix the Yogurt: Combine the Greek yogurt with 1 tablespoon of chopped fresh coriander and the juice of ¼ lemon. Mix until evenly combined and set aside.
Cook the Onion and Garlic: Heat 2 tablespoons of olive oil in the tagine over low heat. Add the sliced onion and chopped garlic, cover with the lid, and allow them to cook gently for about 2 minutes so their aromas and moisture remain inside the tagine.
Add the Pumpkin and Spices: Remove the lid and add the cubed pumpkin, dates, ras el hanout, cinnamon, and optional rose harissa. Stir and cook over low heat for another 2 minutes.
Add the Broth and Cumin: Pour in the vegetable broth and add the cumin seeds. Stir everything thoroughly so the ingredients and spices are evenly distributed.
Simmer the Tagine: Cover the tagine with its lid and let the mixture stew for a total of 20 minutes over low heat, opening it occasionally to stir everything together.
Prepare the Couscous: Bring water to a boil in a separate cooking pot with 1 tablespoon olive oil and a pinch of salt. Once boiling, turn off the heat and add the couscous.
Steam the Couscous: Cover the pot with its lid and let the couscous stand for 5 minutes, allowing it to absorb the hot water.
Finish the Tagine: Once the pumpkin is ready, add the chickpeas and toasted almonds. Stir gently and allow everything to heat through.
Add the Garnishes: Remove the tagine lid and sprinkle the remaining chopped coriander over the top. Spoon the prepared lemon-coriander yogurt into the center of the tagine.
Serve Without Stirring: Do not stir the yogurt into the tagine at this stage. Serve the finished pumpkin and chickpea tagine alongside the prepared couscous.