Vegan Stuffed Portobello Mushroom Burgers with Roasted Potato
Plant-based comfort food featuring meaty portobello mushroom caps filled with a savory mixture of breadcrumbs, pine nuts, and fresh herbs. The mushrooms are paired with crispy herb-roasted potato wedges and homemade tomato ketchup for a satisfying burger experience. Perfect for weekend dinners or entertaining guests who appreciate creative vegan cuisine. The combination of textures from the tender mushrooms, crunchy stuffing, and golden potatoes creates a well-balanced meal that rivals any traditional burger.
Ingredients
- 4 tomatoes
- salt
- freshly ground black pepper
- ½ teaspoon ground allspice
- 1 tablespoon balsamic vinegar
- 1 teaspoon brown sugar
- 1 tablespoon olive oil
- 4 large potatoes
- 2 teaspoons Dijon mustard
- 2 tablespoons oil
- 1 teaspoon cider vinegar
- 1 sprig rosemary
- 4 tablespoons vegan butter or margarine
- ½ onion
- 4 portobello mushrooms
- 1 clove garlic
- 1 sprig thyme
- 1 cup white breadcrumbs
- 1 tablespoon red wine vinegar
- 3 tablespoons pine nuts, toasted
- ¼ cup fresh flat-leaf parsley, chopped
- 4 ciabatta rollsburger buns1:1convenience
easier to find
- arugula leaves
Instructions
- 1
Preheat oven to 400°F
- 2
Place tomatoes on baking sheet and sprinkle with salt, pepper, allspice, balsamic vinegar, brown sugar and oil, then roast for 1 hour
- 3
Remove tomatoes from oven and cool before pressing through sieve, then season and chill
- 4
Slice potatoes into thick wedges and place in roasting pan
- 5
Whisk together Dijon mustard, oil, cider vinegar, rosemary, salt and pepper, then pour over wedges and toss to coat
- 6
Roast potato wedges for 1 hour, shaking pan occasionally to prevent sticking
- 7
Heat oil and half the vegan butter in frying pan, add onion and season, then sauté until softened
- 8
Remove mushroom stalks, finely chop and add to pan
- 9
Sweat onion and mushroom stalks briefly, then add garlic and thyme, season and cook for few more minutes
- 10
Add breadcrumbs, remaining vegan butter and red wine vinegar to pan, fry until golden
- 11
Stir in toasted pine nuts and chopped parsley
- 12
Grease baking sheet and rub mushrooms with oil, season outsides with salt and pepper
- 13
Divide breadcrumb mixture between mushrooms and pack tightly
- 14
Place on baking sheet and bake for last 30 minutes of potato cooking time
- 15
Spread ketchup in rolls and serve burgers with arugula leaves and potato wedges
Tips
Choose firm, dry portobello mushrooms for best texture and to prevent soggy stuffing during baking.
Make the tomato ketchup ahead of time as it develops better flavor after chilling and can be stored for two days.
Pack the breadcrumb stuffing tightly into mushroom caps to ensure it holds together during baking.
Good to Know
Store leftover ketchup in refrigerator for up to 2 days. Cooked mushrooms and potatoes best consumed immediately.
Tomato ketchup can be made up to 2 days in advance. Potato wedges can be cut and seasoning mixture prepared earlier in day.
Serve immediately while mushrooms and potatoes are hot for best texture and flavor.
Common Mistakes
Don't skip seasoning the mushroom exteriors to avoid bland flavor.
Pack stuffing firmly to prevent it falling out during baking.
Shake potato pan regularly to avoid sticking and ensure even browning.
Substitutions
easier to find
FAQ
Can I use regular button mushrooms instead of portobello?
Yes, but use larger button mushrooms and reduce cooking time slightly as they're smaller and cook faster than portobellos.
How long will the homemade ketchup keep?
The roasted tomato ketchup will keep in the refrigerator for up to 2 days when stored in an airtight container.
Can I make this gluten-free?
Yes, substitute gluten-free breadcrumbs and use gluten-free burger buns. The rest of the recipe is naturally gluten-free.