I've tried so many Lugana's and keep coming back to Ca' dei Frati.  They are the Rolls Royce of simple, clean, 'give me another glass' Lugana.  Made from the local Turbiana grape, think stone fruit - nectarine and peach with fresh white flowers on the nose - delicious and refreshing, sophisticated and elegant, in both looks and tastes.  One of my absolute favourite white wines.