Roasted Red Pepper and Caramelized Onion Focaccia Sandwich

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This Roasted Red Pepper and Caramelized Onion Focaccia Sandwich has a balance of flavors. It is sweet, rich and savory.

Roasted Red Pepper and Caramelized Onion Focaccia Sandwich on a plate.

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.

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❤️ Why You'll Love It
🧾 Ingredients
🔪 Instructions
💭 Tips
👩🏻‍🍳 Recipe FAQs
Other Vegan Sandwiches
📋 Recipe
💬 Comments

❤️ 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.
Balsamic vinegar: Adds sweetness to the caramelized onions. You could also use sugar or brown sugar.
Vegan mayo: 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.

This is an overview of the ingredients. 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: Roast two 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 2: Caramelize the onions in olive oil. For flavor, I like to add balsamic vinegar near the end of the cooking time.

Step 3: 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

What is Focaccia Bread?

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.

Can I Make Focaccia Using Pizza Dough?

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.

Can I Refrigerate The Dough?

After you mix the dough, you can refrigerate it overnight if you're not ready to bake it yet.