In a bowl, mix the garlic mayo, lemon juice, Dijon mustard, Worcestershire sauce, grated Parmesan, and milk until smooth. Taste and season if needed.
Add the pancetta to a dry frying pan over a medium heat and cook until crispy. Remove from the pan and leave the fat behind. That’s liquid gold, don’t waste it.
Slice the chicken breasts in half lengthways so you have 4 thinner fillets. Add them to a bowl with the olive oil and smoked paprika, then mix well to coat.
Cook the chicken in the pancetta fat for 4 to 5 minutes on each side until golden and cooked through. Remove from the pan and slice.
Shred the romaine lettuce and add it to a large bowl. Pour over the dressing, then add the croutons, crispy pancetta, shaved Parmesan, and sliced chicken.
Toss everything together until coated, then serve up straight away.