The ultimate makeover: Chicken Caesar salad

Name: The ultimate makeover: Chicken Caesar salad
Ingredients: 1½ tbsp lemon juice; 1 tbsp olive oil; 2 tsp fresh thyme leaves, plus a few sprigs; 1 garlic clove, bashed to bruise; 4 organic/free-range skinless boneless chicken breast fillet, about 140g/5oz each; 100g rustic granary bread; 2 tbsp olive oil; 1 garlic clove, finely chopped; 1 tsp Dijon mustard; ½ tsp Worcestershire sauce; 1 tbsp lemon juice, plus extra for squeezing; good pinch chilli flakes; 4 anchovy fillets, finely chopped; 3 tbsp good-quality mayonnaise (we used Hellman's); 4 tbsp fat-free yogurt; 1 head romaine or Cos lettuce, leaves separated, washed and dried; 100g bag rocket or watercress; 25g piece Parmesan, shaved with a potato peeler