In a small pot, simmer cream, whole milk, sugar, salt and Earl Grey Tea, about 5 minutes. Remove pot from heat. Pass through a fine sieve and discard tea leaves.
In a separate bowl, whisk yolks, vanilla extract and cream cheese. Whisking constantly, slowly whisk 1/3 of the hot cream into the yolks, then, whisk the yolk mixture back into the pot with the cream.
Return pot to medium-low heat and cook until mixture is thick enough to coat the back of a spoon.
Cool mixture at room temperature. Cover with plastic wrap and chill for at least 4 hours or overnight.
Churn cooled base in an ice cream machine according to manufacturer's directions.
Scoop finished earl grey tea ice cream into a large container. This container should be freezer safe as it is what you are going to store the ice cream in.
Microwave the blueberry jam for 10-15 seconds until it is slightly runny. Drizzle the blueberry jam over the earl grey tea ice cream and use a knife to create swirls, incorporating the jam into the ice cream mixture.
Serve the ice cream directly from the bowl as soft serve, or store in the freezer until ready to eat.
Make a delicious Earl Grey Ice Cream Sundae by serving scoops with Blueberry Muffins and fresh blueberries.