Introduction

This steak sandwich is a deliciously satisfying meal, perfect for a hearty lunch or casual dinner. Featuring tender, flavorful steak, caramelized onions, and melted Havarti cheese on a crispy baguette, it’s a treat that’s easy to prepare and sure to impress.

Two sandwiches are placed on a gray metal tray with a few green parsley leaves near the bottom left corner. Each sandwich has three main layers: the top crusty baguette bread is light golden-brown with a slightly rough texture, underneath it there is melted white cheese that looks soft and creamy, and the bottom layer is filled with cooked dark brown beef strips mixed with translucent, caramelized onions. The sandwiches are cut in half, showing the soft and airy texture of the bread inside. The background surface has a white marbled texture. photo taken with an iphone --ar 4:5 --v 7

Ingredients

1/2 cup unsalted butter (softened)
1 tbsp fresh dill (diced)
3 garlic cloves
1 tbsp oil
1 lb steak
1 tbsp salt (adjust to taste)
1 large yellow onion
4 slices Havarti cheese
1 baguette

Instructions

Step 1: Prepare the herb butter by combining the softened butter with crushed garlic and diced dill. Mix until smooth and set aside.
Step 2: Thinly slice the steak into strips. For easier slicing, freeze the steak for a few minutes beforehand.
Step 3: Heat a skillet with oil over high heat. Add the steak slices and season generously with salt. Cook until the beef turns golden, then remove and set aside.
Step 4: Slice the yellow onion into half rings. Using the same skillet, sauté the onions until golden brown, then remove from heat and set aside.
Step 5: Slice the baguette lengthwise and spread the prepared herb butter over both sides of the bread.
Step 6: Layer the steak strips, sautéed onions, and Havarti cheese slices on the baguette.
Step 7: Keep the sandwich open and place under a broiler for about 2 minutes, or until the cheese is melted and bubbly.
Step 8: Serve immediately while warm for the best flavor and texture.

Tips & Variations

For a smoky touch, add a dash of smoked paprika to the steak before cooking.
Swap Havarti cheese for Swiss or provolone for a different melt and flavor.
Try adding fresh arugula or spinach for a peppery, fresh bite.
If you prefer spicier, include a few sliced jalapeños or a spread of horseradish.

Storage

Store leftover steak sandwiches wrapped tightly in foil or plastic wrap in the refrigerator for up to 2 days. Reheat in an oven or toaster oven to help restore the crispiness and melt the cheese again. Avoid microwaving as it can make the bread soggy.

How to Serve

A close-up of a sandwich shows a white toasted baguette cut in half horizontally, forming the top and bottom layers. The bottom layer holds thin slices of cooked beef, brown and juicy with slight charring. On top of the beef, there is a layer of golden-brown caramelized onions, some pieces darker with a slight crisp. The top layer is a slice of melted white cheese, soft and smooth, resting on the onions. The sandwich is placed on a black surface with a white marbled texture background faintly visible. photo taken with an iphone --ar 4:5 --v 7

Serve this delicious recipe with your favorite sides.

FAQs

Can I use other cuts of steak for this sandwich?

Yes, tender cuts like ribeye, sirloin, or flank steak work best for this recipe because they cook quickly and stay juicy.

How do I prevent the baguette from getting soggy?

Spread the herb butter on the bread before assembling to create a barrier. Also, keep the sandwich open while broiling to avoid moisture buildup, and serve immediately after melting the cheese.

Herb Butter Steak Sandwich with Havarti and Caramelized Onions Recipe

Print Recipe

★★★★★

4.8 from 72 reviews

A flavorful steak sandwich featuring tender, thinly sliced beef cooked to golden perfection, caramelized onions, and creamy Havarti cheese, all layered on a fresh baguette spread with savory herb butter. Broiled to melt the cheese for a warm, satisfying meal perfect for lunch or a casual dinner.

Author: Toney
Prep Time: 15 minutes
Cook Time: 15 minutes
Total Time: 30 minutes
Yield: 4 servings 1x
Category: Sandwich
Method: Broiling
Cuisine: American

Ingredients

Scale

Herb Butter

1/2 cup unsalted butter, softened
3 garlic cloves, crushed
1 tbsp fresh dill, diced

Steak Sandwich

1 tbsp oil
1 lb steak
1 tbsp salt, adjust to taste
1 large yellow onion, sliced into half rings
4 slices Havarti cheese
1 baguette, sliced lengthwise

Instructions

Prepare Herb Butter: In a bowl, combine the softened unsalted butter with crushed garlic and diced fresh dill. Mix well until you achieve a consistent and smooth herb butter. Set aside for later use.
Slice Steak: Freeze the steak for a few minutes to make slicing easier, then cut it into thin strips for quick, even cooking.
Cook Steak: Heat a skillet over high heat and add oil to coat. Season the steak strips generously with salt, then add them to the hot skillet. Cook the beef until just golden on the outside, then remove from heat and set aside.
Caramelize Onions: Using the same skillet, add the sliced yellow onions and sauté them until golden brown and tender. Remove from heat and set aside.
Assemble Sandwich: Slice the baguette lengthwise and spread the prepared herb butter evenly on both sides of the bread. Layer the cooked steak strips, caramelized onions, and top with slices of Havarti cheese.
Broil Sandwich: Place the assembled sandwich open-faced under the broiler for about 2 minutes, or until the cheese becomes bubbly and melted.
Serve: Remove from the broiler and serve immediately while warm for the best flavor and texture.

Notes

Freezing the steak slightly before slicing makes it easier to cut thin strips.
Adjust the amount of salt according to your taste preference.
Use a high smoke point oil like vegetable or canola oil for searing the steak.
Broiling time may vary depending on your oven; watch closely to avoid burning the cheese.
Feel free to substitute Havarti cheese with other melting cheeses like provolone or mozzarella if preferred.

Keywords: steak sandwich, herb butter, caramelized onions, Havarti cheese, broiled sandwich, easy steak recipe