Pound boneless chicken breasts to uniform ½-inch thickness so they cook evenly in minutes and stay tender, preventing dry edges while the center catches up.

Save 1 cup of starchy pasta water to adjust sauce consistency at the end—it's the secret to achieving a silky, clingy sauce that coats every strand perfectly.

Whisk pesto into cold half-and-half before adding to the hot pan to prevent it from breaking and ensure the delicate basil flavor stays bright and doesn't turn bitter from heat.

Don't skip the searing step—getting a golden crust on both sides adds deep savory flavor that elevates the entire dish beyond a simple cream sauce.

Grate and stir in Parmesan after removing from heat to preserve its delicate nutty notes and prevent it from clumping or becoming grainy in the hot sauce.