Use a 4-quart slow cooker for best results. Place the rinsed lentils into your slow cooker insert and add the water, beans, onions, carrots, honey, and soy sauce. Stir in the salt, dried mustard, and ginger. Float the bay leaf on top. Cover and cook on low for 6-9 hours or on high for 3-5 hours. Your lentils are finished when they have absorbed the cooking liquid and are bite-tender. If desired, add a bit more honey to the pot for a touch more sweetness.