Combine mayonnaise, parmesan cheese, lemon zest, lemon juice, half of the minced garlic, pepper, Worcestershire sauce, and anchovy paste in a large bowl.

Reserve half of this mixture in the refrigerator.

To the remaining mixture, add the rest of the minced garlic, bread crumbs, and ground beef.

Form the mixture into 12 patties.

Chill the patties in the refrigerator for 1 hour.

Preheat grill to medium heat.

Grill the patties for 8-10 minutes per side, or until the internal temperature reaches 160°F.

Brush the kaiser roll halves with garlic butter.

Toast the buns on the grill until golden brown.

Toss the torn romaine lettuce with the reserved Caesar dressing.

Place the grilled patties on the toasted buns.

Top each burger with the dressed lettuce and crispy bacon slices.

Serve immediately.