Lentils Like Baked Beans

Name: Lentils Like Baked Beans
Ingredients: 4 slices bacon, finely chopped; 1 yellow onion, finely diced; 1/2 teasoon minced garlic; 2 cups (500 millilitres) red lentils, rinsed and picked over; 4 cups (1 litre) water; 1/4 cup (60 millilitres) ketchup; 2 tablespoons maple syrup, plus more as needed; 2 tablespoons neutral oil; 2 tablespoons Colman's mustard powder; 1 tablespoon (15 millilitres) cider vinegar, plus more as needed; 1 teaspoon ground pepper, plus more as needed; 1 bay leaf; Salt