Overnight Eggs Benedict Casserole



1 pound Canadian bacon, diced (leftover fully cooked ham can be used instead)
6 English muffins, diced
8 eggs
2 cups half-and-half or milk
1 teaspoon onion powder
1 teaspoon salt
1/2 teaspoon freshly ground pepper
1/2 teaspoon paprika

Hollandaise sauce:

4 egg yolks
1 tablespoon freshly squeezed lemon juice
1/2 cup unsalted butter, melted
pinch of salt