Preheat oven to 350 degrees.

Mix eggs, dairy, salt, and pepper in a bowl until blended. Heavy whisking will result in lighter, fluffier eggs, less whisking will produce a denser egg.

Add butter to a 13 x 9″ pan or equivalent size casserole, turning casserole to coat sides. Pour the eggs into the center and bake until the eggs begin to set, 8 to 12 minutes.

Leaving the pan in the oven, so as to retain as much heat as possible, pull out the rack just enough to reach the eggs with a spatula. Using a spatula, quickly but gently PUSH and PULL the eggs from the bottom and sides, forming large, soft curds. Push rack back and continue to cook.

Repeat the pulling and pushing a time or two more until eggs are thickened and no visible liquid remains. The eggs should appear very moist but will continue to cook from the heat of the pan. If you leave the pan in the oven until the eggs look “done,” they will be overcooked.

The process will take about 20 to 25 minutes.

Serve immediately.