June 29, 2026 · 10 min

Mushroom and Mozzarella Hoagies with Dijon Mayo and Potato Wedges

Dinner10 min985 cal / serving

These hearty mushroom and mozzarella hoagies are a veggie-packed twist on a classic sandwich. Meaty cremini mushrooms are sautéed with bold steak spices until crispy and caramelized, then stuffed into toasted baguettes with a creamy Dijon mayo, sautéed peppers and onions and a blanket of gooey mozzarella cheese. Served alongside seasoned potato wedges, this restaurant-style meal is perfect for a satisfying dinner.

The combination of savory mushrooms, tangy Dijon and melted cheese creates a flavor explosion in every bite. The potato wedges are roasted with a special fry seasoning until golden and tender, making them the ideal sidekick. Ready in about 35 minutes, this recipe is a delicious way to enjoy a meatless meal that doesn’t skimp on taste.


Recipe details

Dinner10 min985 cal / serving2 servings

Nutrition per serving

Calories985 kcalProtein21.8 gFat58.8 gCarbs88.3 gSugar28.1 gFiber5.8 gSodium5980 mg

Dietary labels

Gluten-free: noLactose-free: noDairy-free: no

Allergen check

Gluten / wheat: containsMilk / dairy: containsEgg: containsFish: not detectedShellfish: not detectedPeanut: not detectedTree nuts: not detectedSoy: containsSesame: not detectedMustard: containsCelery: not detectedSulphites: not detectedLupin: not detectedMolluscs: not detected

Values are calculated per serving from ingredient amounts and the ingredient nutrition reference per 100g. Allergen and diet labels use available ingredient metadata and name matching; always check product labels for strict diets or allergies. Some ingredient amounts or nutrition values were incomplete, so this is marked as a partial estimate.


Ingredients

Cremini Mushrooms8 ounce Cremini MushroomsView ingredient guide
Yellow Onion1 unit Yellow OnionView ingredient guide
Long Green Pepper1 unit Long Green PepperView ingredient guide
Potatoes12 ounce PotatoesView ingredient guide
Fry Seasoning1 tablespoon Fry SeasoningView ingredient guide
Mayonnaise4 tablespoon MayonnaiseView ingredient guide
Dijon Mustard2 teaspoon Dijon MustardView ingredient guide
Demi-Baguette2 unit Demi-BaguetteView ingredient guide
Mozzarella Cheese0.5 cup Mozzarella CheeseView ingredient guide
SaltSaltView ingredient guide
PepperPepperView ingredient guide
Olive Oil2 tablespoon Olive OilView ingredient guide

Instructions

  1. Preheat the oven to 450°F (230°C) with racks in the top and middle positions. Wash and dry all produce. Cut the potatoes into ½-inch-thick wedges. Halve, peel and thinly slice the onion. Halve, core and thinly slice the green pepper. Trim and slice the mushrooms into ¼-inch-thick pieces (skip if pre-sliced).
  2. On a baking sheet, toss the potato wedges with a drizzle of olive oil, half the fry seasoning, salt and pepper. Spread in a single layer. Roast on the top rack until golden brown and tender, 20-25 minutes.
  3. Meanwhile, heat a drizzle of olive oil in a large pan over medium-high heat. Add the sliced onion, green pepper and remaining fry seasoning. Cook, stirring occasionally, until softened and lightly browned, 5-7 minutes. Season with salt and pepper. Transfer to a medium bowl and wipe out the pan.
  4. In a small bowl, combine the mayonnaise and Dijon mustard; season with salt and pepper. Set aside. Slice the baguettes lengthwise, stopping before cutting all the way through. Place them cut-side up on a second baking sheet. Toast on the middle rack until lightly golden, 3-5 minutes.
  5. Heat a drizzle of olive oil in the same pan over medium-high heat. Add the sliced mushrooms and cook, stirring occasionally, until browned and crispy, 5-7 minutes. Sprinkle with half the steak spice (use all for 4 servings) and salt; cook, stirring, for 30 seconds until fragrant. Stir in the mushroom stock concentrate and a splash of water. Cook until the liquid evaporates and the mushrooms are saucy, 1-2 minutes. Return the cooked peppers and onions to the pan; stir to combine.
  6. Spread the cut sides of the toasted baguettes with half the Dijon mayo (or all for extra sauciness). Fill each baguette with as much of the veggie mixture as will fit, then sprinkle the mozzarella cheese evenly over the top. Return the baking sheet to the oven and bake until the cheese melts, 2-3 minutes. Divide the hoagies and potato wedges between plates. Serve with the remaining Dijon mayo on the side for dipping.

Recipe Tips

For extra crispy mushrooms, avoid overcrowding the pan and cook in batches if needed.

If you prefer a spicier kick, add a pinch of red pepper flakes to the mushroom mixture.

To make the hoagies even more indulgent, use all the Dijon mayo on the bread instead of saving some for dipping.

FAQ

Can I use a different type of mushroom?

Yes, you can substitute cremini mushrooms with white button, portobello or shiitake mushrooms. Adjust cooking time as needed.

What can I use instead of demi-baguettes?

You can use regular baguettes, hoagie rolls or even ciabatta bread. Adjust toasting time accordingly.

Can I make this recipe vegan?

To make it vegan, use vegan mayonnaise, dairy-free mozzarella and ensure the baguettes are vegan-friendly. The rest of the ingredients are plant-based.

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