This Roasted Red Pepper and Caramelized Onion Focaccia Sandwich has a balance of flavors. It is sweet, rich and savory.
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Anytime I can include roasted red pepper and caramelized onion in a recipe, I'm all over it. I love the combination.
Here I made a Roasted Red Pepper and Caramelized Onion Focaccia Sandwich on sun-dried tomato and black olive focaccia bread. You could use whatever focaccia bread you prefer.
I like the sun-dried tomato and black olive focaccia with this sandwich because it balances out the sweetness of the roasted red pepper and caramelized onion with a savory salty briny taste.
Other roasted red pepper recipes are my Roasted Red Pepper and Tofu Ricotta Dip, Roasted Red Pepper Dip recipe, and my Roasted Pepper Tapenade.
Other flavorful sandwich recipes to try are my Vegan BLT Focaccia Sandwich and my Tofu Banh Mi recipe.
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❤️ Why You'll Love It
- It has a balance of flavors.
- It is healthy and hearty.
- Roasted red pepper and caramelized onions elevate anything you add them to.
🧾 Ingredients
- Red peppers: I used fresh red peppers that I roasted. You can also use store-bought roasted red peppers.
- Onions: You can use sweet onions, yellow onions or white onions. I prefer sweet onions or yellow onions.
- Olive oil: For cooking the onions in and for roasting the red pepper.
- Salt: Enhances flavors. I like to use sea salt.
- Balsamic vinegar: Adds sweetness to the caramelized onions. You could also use sugar or brown sugar.
- Vegan mayo (optional): I like Vegenaise by Follow Your Heart. Use your favorite vegan mayonnaise.
- Focaccia bread: I used sun-dried tomato and black olive focaccia bread. You could use any focaccia bread you like or your favorite bread.
To see the full list of ingredients with measurements and instructions, see the recipe card at the bottom of this post.
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🔪 Instructions
Step 1: Drizzle olive oil on a parchment paper lined baking sheet. Slice red peppers in half, scoop out seeds, and place skin facing up on parchment.
Drizzle a little more olive oil on top.
Step 2: Roast the red peppers in the oven until they are charred. You then peel off most of the skin. By leaving a little of the charred skin on, you get some of that charred flavor.
Step 3: Add olive oil to a hot pan. Add sliced onions.
Step 4: Cook for about 35-40 minutes. Pour a splash of balsamic vinegar to deglaze the pan near the end of the cooking time.
Step 5: Spread vegan mayo on warmed focaccia bread, and layer the roasted red pepper and caramelized onions on top.
💭 Tips
- There are several ways you can roast red peppers. I prefer the oven method because it's set it and forget it.
- If you're crunched for time, you can always use store-bought roasted red peppers.
- Slice red peppers in half so they roast faster.
- Peel most of the charred skin off, leaving a little on for some smoky flavor.
- When making caramelized onion, slow and steady wins the race. For caramelized onions, you need some patience. It takes a good 40 minutes to get nicely browned onions.
- If they start to stick add a little water - like a quarter of a cup or so.
- Balsamic vinegar adds a wonderful flavor. I always add a couple of splashes near the end of the cooking time.
- Warm the focaccia after slicing, then layer the ingredients.
👩🏻🍳 Recipe FAQs
Focaccia is an oven-baked flatbread that originated in Italy. It is an olive oil-flavored yeast bread sometimes topped with herbs or other toppings.
It can be eaten by itself, or sliced and made into a sandwich. For serving by itself, it can be cut it into a variety of shapes, including long rectangles, triangles, or squares.
Yes, that's what I did here! I used Pamela's pizza mix to make the focaccia, which makes it really easy. You just need to let the dough rise, which you can start the day before, and let it sit in the fridge.
After you mix the dough, you can refrigerate it overnight if you're not ready to bake it yet.
Other Vegan Sandwiches
If you tried this Roasted Red Pepper and Caramelized Onion Focaccia Sandwich Recipe or any other recipe on my website, please leave a ⭐️ star rating and let me know how you like it in the 💬 comments below. I love hearing from you!
📋 Recipe
Roasted Red Pepper and Caramelized Onion Focaccia Sandwich
Ingredients
- 2 red peppers
- 1 onion sliced
- 2 tablespoons olive oil + more for drizzling on red peppers
- Splash or 2 balsamic vinegar
- Pinch salt
- 8 slices focaccia - I used Sun-dried Tomato and Black Olive
- 4 tablespoons vegan mayo (optional)
Instructions
- Preheat oven to 450°F.
- Slice red peppers in half. Place on a parchment lined baking sheet. Drizzle olive oil on peppers. Roast at 450°F for 15 minutes, or until charred.
- Let cool. Peel off most of the skin, leaving a little on for flavor.
- Heat 2 tablespoons olive oil in a pan on medium low heat. Add sliced onions. Sprinkle salt on onions.
- Stir the onions every few minutes or so. Cook about 35-40 minutes until they are well-browned. Add a couple of splashes of water if they start to stick. Add balsamic vinegar and cook until it's evaporated.
- Warm focaccia in oven or microwave. Spread vegan mayo on half the slices.
- Layer roasted red pepper and caramelized onion on top. Top with other slices of focaccia.
Notes
Nutrition
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*Note: Nutrition information should be considered an estimate only. Different nutrition calculators give you different results.
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