In a large bowl, mix the milk and sweetened condensed milk. Add the zest of 4 of the limes and the pudding mix. Whisk to combine. While continuing to whisk, add the lime juice, and mix to combine.

While the pudding is thickening, use an electric mixer to whip the heavy cream with the powdered sugar and vanilla until stiff peaks form. Fold the whipped cream into the pudding mixture in 2 portions.

Assemble the "lasagna" by spreading a thin layer of the pudding mixture into the bottom of a 13x9-inch pan. Use just enough of the pudding to hold down the first layer of graham crackers. Place graham crackers in a single layer over the thin layer of pudding. Break or cut the crackers to fit to the edges of the pan. Spread about 1/3 of the pudding mixture over the crackers. Repeat layers of graham crackers and pudding ending with a layer of graham crackers.

Cover and refrigerate overnight.

Makes 12 to 16 servings.

Recipe can be halved and made in an 8x8-inch pan.

Submitted by: Mike Sullivan