I have never made this for DH, because he doesn't like spinach. I used to make it for my friends all the time, and they loved it.
1/2 Tablespoon olive oil
1/2 of a small onion, diced
5 oz package of frozen spinach, thawed, squeezed, and dried
1/8 teaspoon nutmeg
1/2 cup bread crumbs (about 1 slice)
1/4 cup grated Romano cheese
1/4 cup heavy cream
1/2 teaspoon salt
1 lb ground beef
Preheat the oven to 375. Pre-spray a metal pan with cooking oil. In a skillet, cook the onion in the olive oil over medium-high heat. Cook about 5 minutes, until the onion is tender. Remove half the onion from the pan, and set aside. To the skillet, add spinach, 1/4 cup bread crumbs, 1/8 cup Romano cheese, 1/8 cup heavy cream, and 1/8 teaspoon salt. To the other 1/2 of the onions, mix together with the raw meat, the egg, the remaining breadcrumbs, the remaining Romano cheese, the remaining cream, and 1/8 teaspoon salt. Mix well. Put 1/2 of the meat into the greased pan, then the spinach mixture, then another layer of meat. Bake for 1 hour and 15 minutes.
Makes about 4 servings.