---
title: "Prosciutto Croque Madame Sandwiches: a Pickled Shallot Salad"
source:
  name: HelloFresh
  url: https://www.hellofresh.com/recipes/prosciutto-croque-madame-sandwiches-634ed69a5ee51358710c99de
servings: 2
prep time: 15 minutes
cook time: 15 minutes
time required: 30 minutes
difficulty: Medium
allergens: [Milk, Soy, Wheat, Eggs]
tags: [French, Sandwich, Breakfast, Salad]
rating: 4.5
rating_count: 2400
source_chef: Michelle Doll Olson
review_highlights:
  - theme: Flavor
    text: Many loved the rich, indulgent taste, though some found it overly salty; adjusting seasoning to taste is recommended.
  - theme: Ease of prep
    text: While some found it simple, others felt it had many steps; reading instructions carefully beforehand helps.
image: "https://images.recipes.furrysalamander.com/prosciutto-croque-madame-sandwiches.avif"
---

Preheat #oven{} to 450°F with rack in middle position. Wash and dry all produce. Peel and slice @shallot{1%unit}(very thinly), quarter @lemon{1%unit}, and finely chop @chives{2%tbsp}.

In a #small bowl{}, combine @cream sauce base{2%oz} and half the @dijon mustard{2%tbsp}. Season with @black pepper{1%pinch}. Arrange half the @sourdough bread{4%slices} on one side of a #baking sheet{}. Spread with a thin layer of mustard cream sauce, then top with @prosciutto{3%slices}, @gouda cheese{2%slices}, and another drizzle of mustard cream sauce. Arrange remaining bread on empty side of sheet; spread with a thin layer of mustard cream sauce. Bake until bread is golden, cheese begins to melt, and prosciutto is lightly browned ~{7%minutes}.

Meanwhile, heat a drizzle of @cooking oil{1%tsp} in a #medium pan{} over medium heat. Once hot, crack @eggs{2%unit} into pan and cover with a lid. Fry until whites are set ~{2%minutes}. Season with @salt{1%pinch} and pepper.

While eggs cook, in a second small #microwave-safe bowl{}, combine shallot, juice from two lemon wedges, @sugar{1%tsp}, @water{1%tsp}, salt, and pepper. Cover bowl with plastic wrap and microwave ~{1%minute}. Reserve 2 tbsp pickling liquid, then drain. In a third small bowl, whisk together reserved pickling liquid, remaining mustard, and @olive oil{2%tbsp}. Season with salt and pepper to taste.

Once bread has toasted, remove sheet from oven. Carefully top bread with prosciutto and gouda with remaining toasted bread, sauce sides down, to create sandwiches. Top with half the @parmesan cheese{1%oz}, fried eggs, and a drizzle of remaining mustard cream sauce. Sprinkle with remaining parmesan. Heat broiler to high. Return to oven until cheese melts and eggs are cooked to preference ~{3%minutes}.

In a #medium bowl{}, toss @mixed greens{2%cups} and pickled shallot with dressing. Divide sandwiches between plates. Garnish with chives. Serve salad and remaining lemon wedges on the side.