Mushroom & Lemon Pepper Popovers

Popovers
1 cup all-purpose flour
1 teaspoon ground lemon pepper
2 teaspoons finely grated lemon zest
1 cup whole milk
3 large eggs
2 tablespoons melted butterMushroom Layer
6 medium white button mushrooms (about 2-inches wide each), chopped to 1/4-inch pieces
2 tablespoon butter, plus more for greasing the pan
1 teaspoon ground lemon pepper
Preheat the oven to 450°F with a rack positioned in the centre. Generously butter a 6-cup popover pan or large muffin tin.

Popovers
In a 4-cup liquid measuring cup or medium bowl with spout, whisk together the flour, lemon pepper, and lemon zest.

In a small bowl, whisk together the milk, eggs, and melted butter. Pour the egg mixture over the flour mixture and whisk until combined. Cover and set aside for 30 minutes.Mushrooms
In a medium skillet, over medium-high heat, melt the butter until bubbly. When it bubbles, toss in the sliced mushrooms and lemon pepper. Cook, stirring occasionally, until most of the water has been cooked out of the mushrooms and they are very tender.

Assembly
When the batter has rested 20 minutes, put the greased popover pan in the oven for 10 minutes to heat.

Once the popover pan is hot, remove it from the oven, and quickly close the oven door to retain the heat. Spoon the cooked mushrooms into the hot pan, being sure to distribute them as evenly as possible. Give the batter a stir, then gently pour it evenly between the six wells.

Bake for 10 minutes. Reduce the oven temperature to 375°F and continue baking for another 30 minutes. The popovers will emerge tall and golden brown with bits of mushrooms visible at the crown. Serve immediately. The popovers will deflate within minutes but should retain their signature air pockets