American · United States
Mushroom & Tomato Burger
A vegetarian burger featuring sautéed mushrooms, caramelized onions, and fresh tomato, served on a brioche bun with a tangy ketchup.
15 minutes4 servings
Ingredients
Method
- Sauté mushrooms and onions in a pan until softened and caramelized.
- Toast brioche buns lightly.
- Spread mayo on the bottom bun, add spinach, then mushroom-onion mixture.
- Top with tomato slices and a dollop of ketchup.
- Place the top bun and serve.