Warm and prep the grilled chicken: If your chicken is cold from the fridge, warm it briefly in a 350°F (175°C) oven for 6–8 minutes or on a skillet over medium heat for 3–4 minutes per side until heated through. Warming keeps the chicken juicy and makes it easier to slice cleanly; cold chicken can feel dry and the dressing won’t cling as well.

Slice the chicken on the bias: Rest the warmed breasts 3–4 minutes, then slice thinly against the grain. Cutting on the bias shortens the muscle fibers, giving you tender, restaurant-style slices that are pleasant to chew and distribute well in each bite.

Prepare the lettuce: Trim the romaine, remove any wilted outer leaves, then slice or tear into 1–2 inch pieces. Dry the leaves thoroughly in a salad spinner or with paper towels — dry leaves allow the dressing to cling instead of sliding off, keeping the salad crisp.

Make the yogurt Caesar dressing: In a medium bowl combine the Greek yogurt, lemon juice, Dijon mustard, grated garlic, and optional Worcestershire sauce. Whisk until smooth. This yogurt base provides the tang and creaminess of a classic Caesar but with fewer calories and a bright dairy tang that complements the lemon.

Emulsify with olive oil: While whisking vigorously, slowly drizzle in the olive oil to create a loose emulsion. This step coats the yogurt molecules with oil so the dressing becomes silky rather than watery — it helps the dressing cling to leaves and chicken. If the dressing is too thick, add 1–2 tsp cold water to thin.

Season and taste: Stir in 2–3 Tbsp of grated Parmesan (reserve shavings for garnish), then season with 1/2 tsp kosher salt and a generous grind of black pepper. Taste and adjust with more lemon juice for brightness, salt for depth, or a splash of Worcestershire for umami. Balancing acid, salt and fat is the key to a memorable dressing.

Toss the salad: In a large chilled bowl add the dried romaine and 3–4 tablespoons of the dressing. Toss gently — start with less dressing to avoid overdressing; you can always add more. The goal is light, even coating so each leaf has flavor without becoming soggy.

Plate with texture: Divide the dressed romaine among four plates. Fan sliced chicken over the lettuce, then scatter whole-grain croutons for crunch and finish with the reserved Parmesan shavings. Layering the components rather than tossing them together preserves texture contrast (crispy croutons and tender chicken).

Final season and serve: Finish each plate with a small drizzle (½ tsp) of olive oil, an extra squeeze of lemon if desired, and a light grind of black pepper. Serve immediately so the romaine stays crisp and the croutons remain crunchy.

If you want to prepare ahead: Make the dressing up to 24 hours ahead and refrigerate in an airtight container (shake or whisk before using). Keep lettuce and croutons separate until serving to prevent sogginess, and rewarm sliced chicken briefly before plating.