There will be about 3/4 cup of parsley pesto left over after making this lasagne.
Cooks' notes:
·Lasagne can be assembled 2 hours ahead and chilled, covered. Bring to room temperature before baking.
·Lasagne can be baked 1 day ahead and cooled completely, then chilled, covered. Let stand at room temperature 1 hour, then heat in a preheated 350°F oven, covered, until hot, 30 to 40 minutes.