3 egg whites
1/2 cup water
1/2 cup lemon juice
2 egg yolks
15 ounces powdered sugar
1 tablespoon instant coffee granules
1 1/2 cups evaporated milk
1 cup all-purpose flour
Line a 9x13-inch pan with aluminum foil. Press using a fork any moisture that appears to form in the foil.
In a large saucepan, combine lemon juice, egg yolks, powdered sugar and coffee granules; cook over medium heat, stirring constantly, until bubbly. Remove from heat and stir in evaporated milk, flour, and instant sugar until well blended.