Chocolate Gelato
1 cup sugar
2 cups milk
1 cup cocoa powder, sifted
3 1/2 ounces bittersweet chocolate, chopped
4  egg yolks, beaten lightly

In a heavy saucepan cook 1/4 cup sugar, undisturbed, over moderate heat until it begins to melt and cook, stirring with fork, until melted completely and deep golden brown. Remove pan from heat and dip pan briefly into a bowl of ice water to stop cooking. (Caramel will harden). Cool pan about 5 minutes and return to heat. Add milk and cook over moderate heat, whisking until caramel is melted. Whisk in cocoa until combined well and keep mixture warm.

In a metal bowl set over a saucepan of barely simmering water melt chocolate, stirring, and remove from heat. In a bowl with an electric mixer beat egg yolks with remaining 3/4 cup sugar until thick and pale. Whisk in caramel mixture and chocolate in streams, whisking until combined. Pour custard into another 3 quart heavy saucepan and cook over moderately low heat until a candy thermometer registers 140 F. Cook custard stirring (do not let it boil), 4 minutes more and remove from heat. Cool custard completely and freeze in an ice cream maker.

Coffee Gelato
2/3 cup sugar
4  egg yolks
1 cup milk; at room temperature
1/8 teaspoon salt
4 teaspoons instant coffee
1 cup heavy cream

Beat the sugar and egg yolks together until pale yellow and very thick. Slowly add the milk, beating gently to avoid a build-up of foam. Stir in the salt. Transfer mixture to the top of a double boiler with an inch of boiling water in the bottom half. Regulate heat so water remains at a low boil, and stir continuously 8 minutes. Custard will thicken enough to coat the spoon, and surface foam will disappear. Immediately remove top of double boiler and set it in a large bowl of cold water. Stir 2 minutes to cool custard somewhat. Then transfer it to a bowl and add the coffee, stirring to dissolve it thoroughly. Cover and set in refrigerator to chill thoroughly. Also chill heavy cream. When ready to proceed, whip cream into soft peaks and stir it into coffee custard. Transfer mixture to ice cream machine and proceed according to machine's directions.

Lemon & Orange Gelato
2  cups milk
2 tablespoons orange zest
2 tablespoons lemon zest
5 egg yolks
3/4 cup sugar
4 tablespoons lemon juice

Scald the milk with the orange and lemon zest in a medium saucepan. Whisk the egg yolks and sugar to blend. Gradually whisk half of the hot milk into the yolks. Return the yolks to the saucepan with remaining milk. Stir over low heat until custard thickens and leave a path on the back of the spoon when you draw your finger across it. Do not let the mixture boil. Transfer the mixture to a large bowl and chill.

Once the mixture is cool stir in the lemon juice. Transfer to ice cream maker and process according to manufacturer’s instructions.

Peach Gelato
1 cup  sugar
2 cups water
1 1/4 lb fully ripe peaches, peeled halved and pitted
1/2 teaspoon lemon juice
1 cup heavy cream

Put sugar and 2 cups water in a saucepan. Stir over medium heat until sugar dissolves, then raise heat, bring syrup to a boil and boil 5 minutes. Transfer syrup to a bowl and let it cool completely. Purée peaches in a food processor or blender. Measure out 2 cups of purée and stir in lemon juice. Add purée to cooled sugar syrup and chill thoroughly. Whip cream into soft peaks and fold it into fruit mixture. Transfer mixture to ice cream machine and freeze according to machine's directions.

Vanilla Gelato
5 egg yolks 
3/4 cup sugar 
2 cups whole milk 
1 cup light cream
2 teaspoons vanilla extract

Combine egg yolks and sugar in mixing bowl. Beat at medium-high speed until very thick and pale yellow in color. In medium saucepan, heat milk to a simmer. Add half of the milk to the egg yolk mixture; whisk until blended. Stir in remaining milk. Cook over low heat, stirring constantly, until mixture coats back of spoon. Remove from heat; stir in the cream. Pass mixture through a fine strainer into medium bowl set over an ice bath to chill. Stir in vanilla. Freeze in an ice cream maker according to manufacturer's instructions.