1 peel of 1 lime
6 (12 fluid ounce) cans lowfat evaporated milk
3 (14 ounce) cans sweetened condensed milk, or more to taste
1 cup rum, or more to taste
2 teaspoons aromatic bitters (such as Angostura®)
1 teaspoon freshly grated nutmeg
Whisk eggs and lime peel together in a large bowl until light and fluffy. Stir in evaporated milk and condensed milk to taste. Add rum, bitters, and nutmeg. Remove lime peel and serve over crushed ice.