Preparation:

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.
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Look for Perugina Baci, and other Perugina chocolates in your local supermarket, or to purchase on line, visit ColavitaStore.com