Cook bacon in medium saucepan until crisp. Remove bacon and set aside.
Add onion to the bacon juices left in the pan and cook on medium heat for 3-4 minutes stirring regularly until golden brown.
Stir in water and Knorr Beef Stock Pot and bring to the boil. Stir in vinegar, maple syrup and olive oil. Reduce heat to low and simmer for 2-3 minutes, stirring frequently. Season, if desired, with ground black pepper.
Arrange spinach, apples, cranberries and bacon on large serving platter.
Drizzle with warm dressing and serve immediately.