Preheat oven to 350 degrees F.
Roll out the crust and place in a 10-inch pie pan. In a large bowl, combine the flour, sugar, eggs, butter and liqueur. Beat well with a hand mixer. Pour into prepared crust; place the Baci, nut side up, into the batter. Bake for about 45 minutes, or until the top is set. Cool to room temperature before cutting.
Look for Perugina Baci, and other Perugina chocolates in your local supermarket, or to purchase on line, visit ColavitaStore.com