Moroccan - inspired lentil and carrot soup

Name: Moroccan - inspired lentil and carrot soup
Cuisine: Moroccan, African
Ingredients: 1 tbsp olive oil, for cooking; 1 white onion, finely chopped; 1 stick of celery, finely chopped; 2 medium carrots, sliced thinly; 2 garlic cloves, crushed; 1/2 tsp ground cumin; 1 tsp ground coriander; 1 tsp smoked paprika; 1/2 tsp ground tumeric; 200g dried lentils, rinsed; 1 litre vegetable stock; 30g baby spinach; Sprinkle of chopped fresh coriander; Dollop if plain coconut yoghurt