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Ham and Swiss Croissant Sandwich

Buttery croissants filled with honey ham, melted Swiss cheese, Dijon mustard, and baby spinach, then warmed in the oven until the cheese is gooey and the croissant is lightly crisp. A French bistro classic made easy at home.

20 minEasyServes 4680 cal/serving

FrenchLunchOvenStandardHigh ProteinAlcohol-Free

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Ingredients

  • 4 large butter croissants, split horizontally
  • 1 lb thinly sliced honey ham
  • 8 Swiss cheese slices
  • 2 tbsp Dijon mustard
  • 2 tbsp mayonnaise
  • 2 cups baby spinach
  • 8 cornichons (or dill pickles), sliced
  • 1/4 tsp black pepper, freshly ground

Instructions

  1. 1

    Preheat oven to 375 F. Line a baking sheet with parchment paper.

  2. 2

    Stir together 2 tbsp Dijon mustard and 2 tbsp mayonnaise in a small bowl.

  3. 3

    Lay each 4 split horizontally large butter croissants cut-side up on the prepared baking sheet. Spread the Dijon mayo on both cut sides.

  4. 4

    Pile 1 lb thinly sliced honey ham onto the bottom halves, folding the slices loosely. Lay 8 Swiss cheese slices over the ham.

  5. 5

    Place all bottom halves (open-faced with ham and cheese) in the oven. Bake for 7-9 minutes until the cheese is fully melted and bubbling.

  6. 6

    Remove from oven. Top the melted cheese with 2 cups baby spinach and 8 sliced cornichons (or dill pickles). Season with 1/4 tsp freshly ground black pepper.

  7. 7

    Press the top halves of the croissants onto the filling and serve immediately.

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Questions

What temperature do I cook Ham and Swiss Croissant Sandwich at?

For Ham and Swiss Croissant Sandwich, the oven is set to 375 F (about 190 C) in step 1. The longest stretch at that heat is 9 minutes, in step 5.

How do I know when Ham and Swiss Croissant Sandwich is done?

Go by the cues in the method rather than the clock. Step 5: cook until the cheese is fully melted and bubbling.

What can I use instead of Dijon mustard in Ham and Swiss Croissant Sandwich?

The entry for Ham and Swiss Croissant Sandwich calls for 2 tbsp Dijon mustard. In its place: Whole-grain or yellow mustard with a few drops of white wine vinegar. Yellow is milder, so use a little more.

Can I make Ham and Swiss Croissant Sandwich dairy-free?

Yes. The dairy in Ham and Swiss Croissant Sandwich is 4 large butter croissants, split horizontally, 8 Swiss cheese slices. Swap the butter for olive oil where it melts, or a plant-based block butter where it is creamed; the cheese for a plant-based melting cheese (expect a milder flavor). The richness shifts slightly, but the method does not change.

How much protein is in Ham and Swiss Croissant Sandwich?

One serving (the recipe makes 4) has 25 g of protein in about 680 calories, alongside 45 g carbohydrate and 28 g fat, plus 1 g fiber and 680 mg sodium. The figures are estimates computed from the ingredient list. More like it: the high-protein lunch collection.

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