In a bowl combine milk, lime juice, heavy cream, 1/2 & 1/2, salt and sweetened condensed milk.
Stir to combine.
Pour mixture into ice cream maker and freeze according to directions.
After it has set up mix in 1/2 C graham cracker crumbs and save some for garnish. Put into a freezer container and freeze for at least an hour or until firm.
Garnish with remaining crumbs
Notes
This recipe makes 2 quarts of ice cream.Stored in an airtight, insulated ice cream container it will last for a couple of weeks.