How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Portobello "Philly Cheese Steak" Sandwich?

You need 11 ingredients. The key ingredients include: 2 teaspoons extra virgin olive oil, 1 medium onion, sliced, 4 large portabella mushrooms, stems and gills removed (optional), 1 large red bell pepper, thinly sliced, and more.

Is Portobello "Philly Cheese Steak" Sandwich suitable as soups & stews?

Yes, Portobello "Philly Cheese Steak" Sandwich falls under the Soups & Stews category and is a great choice for this type of meal.

How do I store leftover Portobello "Philly Cheese Steak" Sandwich?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Portobello "Philly Cheese Steak" Sandwich Recipe

Name: Portobello "Philly Cheese Steak" Sandwich
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 teaspoons extra virgin olive oil; 1 medium onion, sliced; 4 large portabella mushrooms, stems and gills removed (optional); 1 large red bell pepper, thinly sliced; 2 tablespoons fresh oregano, minced or 2 teaspoons dried oregano; 1/2 teaspoon fresh ground pepper; 1 tablespoon all-purpose flour; 1/4 cup vegetable broth; 1 tablespoon reduced sodium soy sauce; 3 ounces reduced-fat provolone cheese, thinly sliced; 4 whole grain buns, split and toasted

Try this homemade Portobello "Philly Cheese Steak" Sandwich recipe the whole family will love. Made with extra virgin olive oil, onion, portabella mushr…

This Portobello "Philly Cheese Steak" Sandwich relies on simple, everyday ingredients such as extra virgin olive oil, medium onion, sliced, fresh ground pepper and all-purpose flour. It comes together quickly and makes 4 servings, at about 182 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It works as a light main on its own or as a starter alongside crusty bread, and it's just as good for a cozy night in as it is for feeding a crowd. Leftovers keep well, so it's a smart choice for meal prep too.

Updated Jun 30, 2026

Serves 4 Soups & Stews

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

A good 1:1 gluten-free flour blend works well if you need a gluten-free version.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Portobello "Philly Cheese Steak" Sandwich

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions