Creamy lentils with spinach and thyme

Name: Creamy lentils with spinach and thyme
Cook time: 1 h
Total time: 1 h
Cuisine: European, British
Ingredients: 200g brown lentils; olive oil; 1 onion, finely chopped; 1 carrot, peeled and finely chopped; 1 clove garlic, crushed; 1/2 a small bunch thyme, leaves picked; 1 bay leaf; 400ml vegetable stock; 200g baby spinach; 200g tin half-fat coconut milk; 1/2 lemon, juiced