1.   If desired, brown the top under a broiler.

2.   Preheat broiler and quickly brown the top of the casserole.

3.   Slightly brown the top of the casserole by turning on the broiler for a minute or so.

4.   Then, run the skillet under the broiler for a minute or two to lightly brown the top.

5.   To brown the top, the restaurant uses the pizza oven or a blow torch, but lacking those tools, a home cook can use the broiler.