Sweet Potato and Chickpea Slow Cooker Tagine

Name: Sweet Potato and Chickpea Slow Cooker Tagine
Prep time: 10 min
Cook time: 4 h
Total time: 4 h 10 min
Cuisine: Moroccan
Ingredients: 1 onion; 1 medium sweet potato; 1 red bell pepper; 1 medium aubergine ((eggplant)); 400 g tin chickpeas, (drained (240g, or ~ 1 1/4 cups, when drained)); 400 g tinned tomatoes ((~ 1 1/3 cups)); 1 tsp ground cumin; 1 tsp ground turmeric; 1 tsp smoked paprika; 1/4 tsp ground cinnamon; Salt; Black pepper; To serve: couscous, yogurt (soy yogurt if vegan), fresh mint