Follow these steps carefully to achieve a perfectly smooth and flavorful Vanilla Cinnamon Ricotta Gelato. The process involves making a custard base, incorporating the ricotta, and then churning to perfection.

1. Prepare the Custard Base:
   • In a medium, heavy-bottomed saucepan, combine the whole milk, heavy cream, granulated sugar, and salt.
   • Place the saucepan over medium heat. Stir frequently with a wooden spoon or heatproof spatula to dissolve the sugar and prevent the milk from scorching on the bottom.
   • Heat the mixture until it is hot and steaming, with small bubbles forming around the edges. Do not bring it to a full boil.
2. Temper the Egg Yolks:
   • While the milk mixture is heating, place the egg yolks in a medium-sized heatproof bowl. Whisk them lightly until just combined.
   • Once the milk mixture is hot, slowly pour about ½ cup of the hot liquid into the whisked egg yolks, whisking constantly. This process, called tempering, gently raises the temperature of the yolks, preventing them from scrambling when added to the hot milk.
   • Pour the tempered egg yolk mixture back into the saucepan with the remaining hot milk mixture.
3. Cook the Custard:
   • Return the saucepan to medium-low heat. Cook, stirring constantly and scraping the bottom of the pan, for about 5-8 minutes, or until the custard thickens enough to coat the back of a spoon. You should be able to draw a line through the custard on the spoon, and the line should hold its shape.
   • The custard should reach a temperature of 170-175°F (77-79°C) on an instant-read thermometer. Be careful not to overheat, or the eggs will curdle.
4. Strain and Cool the Custard:
   • Immediately remove the saucepan from the heat. Pour the custard through a fine-mesh sieve into a clean, heatproof bowl. This will remove any small bits of cooked egg and ensure a perfectly smooth base.
   • Stir in the pure vanilla extract and ground cinnamon (and nutmeg, if using) into the warm custard.
5. Incorporate the Ricotta:
   • Add the fresh whole milk ricotta cheese to the warm custard mixture.
   • Use an immersion blender to blend the ricotta into the custard until completely smooth and homogenous. If you don’t have an immersion blender, you can carefully transfer the mixture to a regular blender and blend until smooth, then return it to the bowl. This step is crucial for achieving a creamy, non-gritty texture.
6. Chill the Gelato Base Thoroughly:
   • Cover the bowl with plastic wrap, pressing it directly onto the surface of the gelato base to prevent a skin from forming.
   • Refrigerate the base for at least 4 hours, but preferably overnight (8-12 hours). This thorough chilling is vital. A very cold base will churn faster and result in smaller ice crystals, leading to a creamier gelato.
7. Churn the Gelato:
   • Once the base is thoroughly chilled, give it a good whisk.
   • Pour the chilled gelato base into your ice cream maker.
   • Churn according to the manufacturer’s instructions, typically for 20-30 minutes, or until the gelato has thickened to the consistency of soft-serve ice cream. It should be creamy and have increased in volume.
8. Ripen/Harden the Gelato:
   • Transfer the churned gelato to an airtight, freezer-safe container. A shallow, flat container is ideal as it helps the gelato freeze more evenly and quickly.
   • Smooth the top with a spatula. You can press a piece of parchment paper or plastic wrap directly onto the surface of the gelato to prevent ice crystals from forming.
   • Freeze for at least 2-4 hours, or until firm enough to scoop. This “ripening” stage allows the flavors to meld further and the texture to set properly.