Mistletoe, Mobsters, & Mozzarella by Peggy Jaeger

Finding a body in the freezer of the family deli isn’t the way Madonna San Valentino planned to start her day.
Adding insult to injury, the investigating detective is the one guy she’s never been able to forget. After seven minutes of heaven in the back seat of his car when they were teenagers, Tony Roma skipped town without so much as a thanks for the memory.
Just when Madonna thinks the present situation can’t get any worse, Tony is ordered to go undercover at the deli to ferret out a killer. Forced to work together, she vows to keep their relationship cool and professional. But with the sexy, longing looks he tosses her at every turn, Madonna’s resolve is weakening.
With Christmas drawing closer and Tony’s investigation taking an unexpected turn, Madonna is at her wit’s end. Can she really be falling for him again? And will he wind up leaving her broken hearted and alone like the last time?