Ready in 45 minutes
Must use real cream!
Combine eggs in a medium bowl; beat well with a whisk.
Whisk together sugar, flour, and salt in a large pan until blended. Whisk in milk and vanilla; bring to a simmer over medium heat, whisking constantly. Remove from heat. Gradually whisk about one-fourth of hot mixture into eggs; add to remaining hot mixture, whisking constantly. Cook over low heat 6 minutes or until thick.
Alternatively: Add coffee -- or -- peppermint and chocolate --or-- rum and raisins.
Remove from heat; whisk in cream. Cool completely; cover and chill thoroughly.
Pour into an ice cream maker and follow instructions with the rock salt and bag of ice.