American · United States
Umami Burger with Caramelized Onions
A rich and savory burger with caramelized onions, roasted tomato, and a homemade umami ketchup, served on a brioche bun.
20 minutes4 servings

Ingredients
Method
- Caramelize onions in a pan with a bit of olive oil until golden brown.
- Toast brioche buns.
- Spread umami ketchup on the bottom bun, add spinach, then caramelized onions.
- Top with roasted tomato slices and lettuce.
- Place the top bun and serve.





