Combine garlic cloves and salt, and mash to a paste with a mortar and pestle. Beat in egg and vinegar.
Remove crusts from bread and crumble slices into a mixing bowl; mix with olive oil and 2 or 3 tablespoons hot water. Add bread to garlic mixture and continue beating. Add additional hot water until mixture is consistency of whipped potatoes. Add mashed potato and beat until smooth.
Yield: About 2 cups.
1 teaspoon garlic salt may be substituted for 4 cloves garlic and 1 teaspoon salt.
Cajun Country -- New Iberia, Louisiana