Whip cream cheese with 1 tablespoon lemon juice until soft and creamy. Spread carefully on bottom of baked pie shell.
Combine 3 tablespoons lemon juice with berry juice to equal 1 cup. Place in medium saucepan and add sugar. Bring to boil.
Make a paste of 1/2 cup water and cornstarch. Add to boiling sugar-water. Cook until thickened; add Jello. Let cool 5 minutes. Fold in strawberries and pour into pastry shell. Chill several hours and serve topped with whipped cream.