-
1
Heat oven to 425u00b0F Coat 9x13 pan with oil. Place English muffin pieces on a rimmed baking sheet and bake until golden brown, 12 to 15 minutes. Transfer to prepared baking dish. Reduce heat to 350u00b0F.
-
2
Heat the oil in a large skillet over medium heat. Add the leek and cook, stirring occasionally, for 4 minutes. Increase the heat to medium-high, add the bacon and cook, stirring occasionally, until beginning to brown, 4-5 minutes more. Spoon over the English muffin pieces.
-
3
In a large bowl, whisk the whole eggsmilk, dry mustard, chives, 1-1/2 C cream, and 1/2 tsp cayenne, 1/2 tsp salt, and pepper. Pour over the leek-bacon mixture and bake until casserole is puffed, golden brown and just set, 40 to 45 minutes.
-
4
Ten minutes before the casserole is finished, make the hollandaise sauce. Melt butter in microwave. Whisk together, in a double boiler, the egg yolks, lemon juice, Dijon mustard, remaining 1/2 C cream, 1/4 tsp cayenne, and 1/2 tsp salt. Heat mixture, over simmering water, whisking constantly, until the mixture is thick enough to coat the back of a spoon, 2-3 minutes. Reduce heat to low. Still whisking constantly, gradually add the melted butter. Sprinkle the casserole with additional chives and serve with hollandaise.
