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slice of sausage, spinach and egg casserole

Sausage, Egg, and Cheese Casserole with Spinach

  • Author: alexandra
  • Prep Time: 20 minutes
  • Cook Time: 40 minutes
  • Total Time: 1 hour
  • Yield: 6 to 8 servings


Use the proportions below as a guide. You can omit the sausage to make it vegetarian. If you want to scale it up or down, a good rule of thumb is 1/2 teaspoon kosher salt for every 4 eggs.


  • 2– to  4-oz baby spinach (I typically use 3 ounces)
  • 1 tablespoon olive oil, plus more as needed
  • 0.50.75 lb. hot Italian sausage
  • 1 yellow onion, thinly sliced or diced
  • 1.5 teaspoons kosher salt, plus more as needed
  • 4 oz. grated cheese, I like Gruyère or Fontina
  • 12 eggs
  • freshly cracked black pepper to taste.


  1. Heat oven to 250ºF. Place spinach in a large colander and set it in the sink. Grease a 9×13-inch pan lightly with butter or with nonstick spray.
  2. In a medium skillet over medium-high heat, heat the oil till it shimmers. Cook the sausage till it browns and is nearly cooked through, about 5 minutes. Break it up with a spoon or a spatula as it cooks. Spoon the sausage over the spinach in the colander in the sink. Return the skillet to the stove top, add a little bit more oil to the pan if necessary, and set it over medium heat. Add the onions. Season with salt. Cook the onions till they begin to caramelize, 7 to 10 minutes. Spoon the onions over the sausage and toss with a spatula or large spoon to gently wilt the spinach. Transfer the spinach-sausage mixture to the prepared pan. Spread the cheese over top.
  3. Break the eggs into a large bowl, season with the 1.5 teaspoons salt and fresh cracked pepper to taste. Beat with a whisk until the eggs are well blended. Pour the eggs into the pan. Season with more pepper to taste. Transfer pan to the oven and bake for 30-40 minutes, rotating the pan halfway through. Start checking at 30 minutes, then every 5 minutes thereafter till it’s done — depending on your oven and the material of the pan you are using, it may take more or less time to cook.
  4. Remove pan from the oven, and let it cool for 5 minutes before serving.
  • Category: Breakfast
  • Method: Oven
  • Cuisine: American

Keywords: egg, casserole, sausage, cheese, spinach