How to Make It
Preheat oven to 450°F. Place 1 teaspoon of the oil in each cup of a 12-cup popover pan or muffin tin. When oven is preheated, place pan in oven for 5 minutes.
Meanwhile, process milk, eggs, butter, and salt in a blender on low until smooth, 1 to 2 minutes. Add flour and process on medium until well combined. Stir in herbs and lemon zest.
Remove popover pan from oven. Working quickly, divide batter evenly among cups, filling almost halfway. Top evenly with cheese.
Bake for 15 minutes. Without removing pan from oven, reduce oven temperature to 350°F. Bake until puffed and well browned, 33 to 35 minutes more.