By Mayo Clinic Staff

Dietitian's tip:

You can prepare this casserole and refrigerate overnight. The next morning, let the casserole stand at room temperature while oven heats and then bake as directed.

To make this plant based, use an egg substitute.

Number of servings

Serves 6
  1. Weight management
  2. Plant-based
  3. Meatless
  4. Healthy-carb
  5. Diabetes meal plan


  1. 1 cup frozen chopped spinach, thawed
  2. 4 large eggs
  3. 4 large egg whites
  4. 1 cup skim milk
  5. 1 1/2 teaspoons dry mustard
  6. 1 teaspoon dried rosemary or 1 tablespoon minced fresh rosemary
  7. 1/2 teaspoon salt-free herb-and-spice blend
  8. 1/4 teaspoon ground black pepper
  9. 6 slices whole-grain bread, crusts removed and cut into 1-inch cubes
  10. 1/4 cup chopped onion
  11. 1/2 cup diced red pepper
  12. 4 ounces thinly sliced reduced-fat Swiss cheese


Heat oven to 375 F. Coat a 7-by-11-inch glass baking dish or a 2-quart casserole with cooking spray.

Place the spinach in a strainer and press with the back of a spatula to remove excess liquid. Set aside.

In a medium bowl, whisk together eggs, egg whites and milk. Add dry mustard, rosemary, spice blend and pepper; whisk to combine.

Toss spinach, bread, onion and red pepper in a large bowl. Add egg mixture and toss to coat.

Transfer to prepared baking dish and push down to compact. Cover with foil.

Bake for 30 minutes or until the eggs have set. Uncover and top with cheese. Continue baking for an additional 15 minutes or until the top is lightly browned.

Transfer to a wire rack and cool for 10 minutes before serving.

Nutritional analysis per serving

Serving size: One piece (3 by 3.5 inches)

  • Calories 258
  • Total fat 10 g
  • Saturated fat 4 g
  • Trans fat Trace
  • Monounsaturated fat 2 g
  • Cholesterol 137 mg
  • Sodium 465 mg
  • Total carbohydrate 25 g
  • Dietary fiber 3 g
  • Added sugars 0 g
  • Protein 17 g
Aug. 02, 2022