Cook the bacon in a skillet from both sides until crunchy. Transfer to a plate that's lined with a kitchen towel to remove any excess oil.
Prepare croutons. Preheat the oven to 350˚F. Cut bread (3-5 slices) into bite-sized cubes, and sprinkle with olive oil and salt. Transfer to a banking pan that's lined with parchment paper and bake for about 10 minutes until crisp and golden.
Tear or cut the iceberg salad into bite-sized pieces and transfer to a large bowl.
Cut the cucumber, radish, and onion into small and thin pieces. Set aside.
Prepare the sauce by finely chopping the anchovy fillets, adding mayonnaise, mustard, and minced garlic, and mixing well to combine.
Add the cucumber, onion, and dressing to the bowl with the iceberg salad.
Take a serving plate, add the cucumber and iceberg salad mix, and sprinkle with bacon, Parmesan, and breadcrumbs. Alternatively, serve directly on a plate in individual servings. Enjoy!