Place all of the ingredients (except the fresh coriander) in your slow cooker and fill the empty can of chopped tomatoes with water and add this too.
400 g Dried Red Lentils, 400 ml Coconut Milk, 400 g Chopped Tomatoes, 1 Onion, 4 Garlic Cloves, 1 tablespoon Fresh Ginger, 1 Lemon, 1 teaspoon Turmeric, 1 teaspoon Mild Chilli Powder, 1 teaspoon Ground Cumin, 1 teaspoon Ground Coriander, 3 teaspoon Mild Curry Powder, 1 teaspoon Garam Masala, 1 Bay Leaf, ½ teaspoon Salt, ¼ teaspoon Black Pepper