Prosciutto & Asparagus Strata

May/June 2013

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This breakfast strata recipe, loaded with onions, leeks and asparagus, is a great way to serve eggs to a crowd for brunch. This healthy breakfast casserole is lightened up by using less bread, low-fat milk and more vegetables. The egg mixture and vegetables can be made ahead, but plan to put the strata in the oven to bake about 1 hour before you want to serve it.

Prosciutto & Asparagus Strata

Makes: 8 servings

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  • 2 slices dense multigrain bread
  • 12 large eggs
  • 1/2 cup low-fat milk
  • 1/2 cup dry white wine or low-fat milk
  • 1 tablespoon dry mustard
  • 1 teaspoon freshly grated nutmeg
  • 3/4 teaspoon salt
  • 1 teaspoon freshly ground pepper
  • 1 tablespoon extra-virgin olive oil
  • 3 cups halved and very thinly sliced sweet onions
  • 1 cup thinly sliced leek(s), white part only
  • 2 cloves garlic, minced
  • 1 bunch thin asparagus (about 1 pound), trimmed and cut into 1-inch pieces
  • 1/4 cup chopped scallions or fresh chives
  • 3 very thin slices prosciutto (about 1 1/2 ounces), torn into strips
  • 1/2 cup freshly grated Parmigiano-Reggiano cheese, divided
  • 2 tablespoons chopped fresh parsley
  • 2 tablespoons chopped fresh mint
  • 2 tablespoons lemon zest (optional)


  1. Cut bread into 1/4-inch cubes. Whisk eggs in a large bowl. Whisk in milk, wine (or another 1/2 cup milk), dry mustard, nutmeg, salt and pepper. Stir in the bread. Let stand at room temperature while you prepare the vegetables. (If baking the next day, cover and refrigerate the egg mixture.)
  2. Heat oil in a large skillet over medium heat. Add onions, leek and garlic; cook, stirring frequently, for 5 minutes. Reduce heat to low and continue cooking very gently, stirring occasionally, until the onions have a little color and appear almost melted, 30 to 45 minutes more.
  3. Meanwhile, bring 1 inch of water to a boil in a medium skillet. Add asparagus, cover and cook for 2 minutes. Drain and let cool; pat dry.
  4. Coat a 9-by-13-inch baking dish (or similar 3-quart dish) with cooking spray.
  5. When the onions are done, stir in scallions (or chives) and cook, stirring for 2 minutes. Transfer to the prepared baking dish and spread into an even layer. Sprinkle the asparagus over the onion mixture. (If baking the next day: cover and refrigerate the vegetables in the baking dish.)
  6. If the egg mixture and vegetables were refrigerated overnight, remove from the refrigerator, uncover and let stand at room temperature for 1 hour.
  7. Preheat oven to 350°F.
  8. Scatter strips of prosciutto over the vegetables. Stir 1/4 cup cheese, parsley, mint and lemon zest (if using) into the egg mixture until well combined, then pour the egg mixture over the vegetables. Sprinkle the remaining 1/4 cup cheese over the top.
  9. Bake the strata just until firm to the touch in the middle and an instant-read thermometer inserted into the center registers at least 160°F, 30 to 40 minutes. Remove from the oven, very carefully cover with foil to keep warm and let rest for 20 to 30 minutes before serving.

Tips & Notes

  • Make Ahead Tip: Prepare egg mixture (through Step 1) and vegetables (Steps 2-5) and refrigerate separately for up to 1 day; remove from the refrigerator about 1 hour before baking (2 hours before serving).


Per serving: 229 calories; 12 g fat (4 g sat, 5 g mono); 288 mg cholesterol; 12 g carbohydrates; 1 g added sugars; 16 g protein; 2 g fiber; 588 mg sodium; 329 mg potassium.

Nutrition Bonus: Folate (26% daily value), Vitamin A (22% dv), Calcium (16% dv), Vitamin C (15% dv)

Carbohydrate Servings: 1

Exchanges: 1/2 starch, 1 1/2 vegetable, 1 1/2 medium fat meat, 1/2 fat

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Recipe Categories

Ease of Preparation
Total Time
More than 1 hour
8 or more
Main Ingredient
Preparation/ Technique
Type of Dish
Main dish, meat
May/June 2013
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