Open-Faced Steak Sandwich with Caramelized Onion and Tomato Relish – Hearty, Savory, and Satisfying

This sandwich is a savory blend of tender steak slices, rich caramelized onions, and tangy tomato relish, served on toasted bread for a satisfying bite.

Ingredients

(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)

• Steak (ribeye, flank, or sirloin)

• Olive oil

• Salt and pepper

• Garlic, minced

• Onions

• Tomatoes

• Balsamic vinegar

• Brown sugar (optional)

• Rustic bread

• Fresh parsley

Directions

1. Season and sear the steak. Slice once rested.

2. Caramelize onions. Add garlic, tomatoes, balsamic, and sugar to create a relish.

3. Toast bread slices.

4. Assemble sandwich with steak, relish, and parsley. Serve warm.

Servings and timing

Serves: 2–4
Prep: 10 min | Cook: 30 min

Variations

• Add cheese like provolone or blue cheese

• Include greens like arugula

• Use mushrooms for extra umami

Storage/reheating

Store toppings separately for up to 3 days. Reheat steak gently and toast fresh bread before serving.

FAQs

(10 full questions were included in the full article)

Conclusion

A bold, flavorful sandwich that’s perfect for lunch or dinner and guaranteed to impress.

Open-Faced Steak Sandwich with Caramelized Onion and Tomato Relish – Hearty, Savory, and Satisfying

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A hearty and savory open-faced sandwich layered with juicy slices of steak, sweet caramelized onions, and a tangy tomato relish—perfect for a satisfying lunch or casual dinner.

• Author: Mariem
• Prep Time: 15 minutes
• Cook Time: 30 minutes
• Total Time: 45 minutes
• Yield: 4 open-faced sandwiches 1x
• Category: Main Course
• Method: Stovetop
• Cuisine: American
• Diet: Halal

Ingredients

Scale 1x2x3x

• 1 lb flank or skirt steak
• Salt and black pepper to taste
• 1 tablespoon olive oil
• 1 tablespoon butter
• 2 large onions, thinly sliced
• 1 teaspoon brown sugar
• 1 tablespoon balsamic vinegar
• 1 cup cherry tomatoes, halved
• 1 teaspoon olive oil (for relish)
• 1 teaspoon red wine vinegar
• 1/2 teaspoon dried oregano
• 4 slices rustic bread (sourdough or ciabatta), toasted
• Fresh arugula or baby greens (optional)

Instructions

1. Season steak with salt and pepper. Let it rest at room temperature for 15–20 minutes.
2. Heat 1 tablespoon olive oil in a skillet over medium-high heat. Sear steak for 3–4 minutes per side (for medium-rare), or until desired doneness. Let rest before slicing thinly against the grain.
3. In a separate pan, melt butter over medium heat. Add onions and cook for 15–20 minutes, stirring occasionally, until deeply golden. Add brown sugar and balsamic vinegar, cook 2 more minutes, then remove from heat.
4. For the relish, toss cherry tomatoes with 1 tsp olive oil, red wine vinegar, and oregano. Season with salt and pepper.
5. To assemble, top toasted bread with a handful of arugula (optional), sliced steak, caramelized onions, and a spoonful of tomato relish.
6. Serve immediately while warm.

Notes

• Flank or skirt steak works well, but ribeye can be used for extra richness.
• Make onions and relish ahead to save time.
• Try with goat cheese or provolone for extra creaminess.

Nutrition

• Serving Size: 1 sandwich
• Calories: 480
• Sugar: 6g
• Sodium: 420mg
• Fat: 24g
• Saturated Fat: 8g
• Unsaturated Fat: 14g
• Trans Fat: 0g
• Carbohydrates: 34g
• Fiber: 3g
• Protein: 35g
• Cholesterol: 75mg

Keywords: steak sandwich, open-faced sandwich, caramelized onion, tomato relish, hearty lunch, steak toast