---
title: "Portobello Burgers and Sweet Potato Fries"
source:
  name: HelloFresh
  url: "https://www.hellofresh.com/recipes/portobello-burgers-and-sweet-potato-fries-57b5bbc37417fe35568b4568"
servings: 2
prep_time: "10 minutes"
cook_time: "20 minutes"
time_required: "30 minutes"
difficulty: Easy
allergens: [Wheat, Eggs]
tags: [Veggie, Quick, Comfort Food]
rating: 4.0
rating_count: 884
source_chef: Recipe Development Team
review_highlights:
  - theme: Crispy Fries
    text: Preheating the baking sheet yields incredibly crispy sweet potato fries
  - theme: Flavorful Jam
    text: The tomato onion jam adds a rich, tangy twist that elevates the veggie burger
image: "https://images.recipes.furrysalamander.com/portobello-burgers-and-sweet-potato-fries.avif"
---
Preheat the oven to 425°F with a #baking sheet{} inside. Wash and dry all produce. Peel @sweet potatoes{2%pieces} and cut into ½-inch sticks. Toss on the hot baking sheet with @olive oil{3%tbsp}, @salt{1%tsp}, and @black pepper{1%tsp}. Bake until golden brown and crispy ~{25%minutes}, tossing halfway through.

Meanwhile, core, seed, and dice 1 @roma tomato{2%pieces}. Thinly slice the remaining tomato. Halve, peel, and thinly slice @red onion{1%piece}. Drizzle @portobello mushrooms{2%pieces} with remaining olive oil and season on all sides with salt and pepper. Place on the baking sheet with the sweet potatoes and bake until tender ~{10%minutes}.

While the vegetables bake, heat olive oil in a #medium pan{} over medium heat. Add the red onion and diced tomato. Cook, stirring often, until soft and jammy ~{10%minutes}, adding a splash of water if the mixture becomes too thick. Season with salt and pepper.

While the jam simmers, halve, pit, and thinly slice @avocado{1%piece}. Halve @brioche buns{2%pieces} and place them in the oven to toast ~{5%minutes}.

To assemble, spread the toasted buns with @mayonnaise{2%tbsp} and the tomato onion jam. Top each with a portobello cap, sliced tomato, and avocado slices. Serve immediately with the sweet potato fries on the side.