Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer) and line a baking tray with baking paper. Mix bacon and 3-4 tablespoons maple syrup. Spread out on the baking tray and bake in a hot oven for approx. 12 minutes.
Take out and let it cool down.
Clean, wash and drain the lettuce and cut into wide strips. Peel, wash and roughly grate the carrots. Cut melon pulp from the skin, remove seeds if necessary. Dice fruit flesh.
Select the blueberries, wash and drain if necessary. Peel and chop the onion. Mix half the berries, onion, vinegar and 2 tbsp. syrup in a tall mixing bowl with a hand blender. Season with salt and pepper.
Add oil underneath.
Mix salad, carrots, melon, remaining berries and peanuts. Arrange on a large plate. Sprinkle with bacon. Drizzle some blueberry dressing over it. Serve the rest.