1. Melt the butter in a small skillet over medium heat, add the panko and toast until golden brown. Set aside.
2. In a bowl, whisk together the mayonnaise, Dijon mustard, garlic, anchovy fillets, lemon juice, and 2 tablespoon of Parmesan cheese. Season with salt and pepper.
3. In a large bowl, combine cucumbers, cherry tomatoes, 1/2 cup Parmesan, half the bacon, and 2 tablespoon toasted breadcrumbs. Toss with the dressing until evenly coated.
4. Garnish with remaining bacon, breadcrumbs, and extra Parmesan cheese. Serve chilled.