Turn the slow cooker on low. Spray the inside with non-stick spray.
Pour the olive oil into the bottom of the slow cooker. Add the onions and garlic, Then add the chickpeas, potatoes, carrots, lentils, maple syrup, paprika, salt, pepper, and bay leaf. Top with crushed tomatoes and broth or water.
Place the lid on top and cook for 15-17 hours. Keep an eye on it toward the end of cooking to see if more liquid may be needed: if so, add a little water or vegetable broth.
Scoop into bowls or plates and top with some fresh chopped parsley if desired.
