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 Roast Beef Hoagies?

You need 11 ingredients. The key ingredients include: 4 whole wheat hoagie buns, split, 4 tablespoons butter, softened, divided, 1 teaspoon Italian seasoning, 1/4 teaspoon garlic salt, and more.

Is Portobello Roast Beef Hoagies suitable as meat & poultry?

Yes, Portobello Roast Beef Hoagies falls under the Meat & Poultry category and is a great choice for this type of meal.

How do I store leftover Portobello Roast Beef Hoagies?

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

Portobello Roast Beef Hoagies Recipe

Name: Portobello Roast Beef Hoagies
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 4 whole wheat hoagie buns, split; 4 tablespoons butter, softened, divided; 1 teaspoon Italian seasoning; 1/4 teaspoon garlic salt; 3/4 pound sliced deli roast beef, julienned; 1/2 pound sliced baby portobello mushrooms; 1 teaspoon dried rosemary, crushed; 1/4 teaspoon pepper; 1/2 pound sliced provolone cheese; 1/2 cup sour cream; 1 tablespoon prepared horseradish

Try this homemade Portobello Roast Beef Hoagies recipe the whole family will love. Made with whole wheat hoagie buns, butter, Italian seasoning and garl…

This Portobello Roast Beef Hoagies relies on simple, everyday ingredients such as butter, softened, divided, italian seasoning, garlic salt and dried rosemary, crushed. It comes together quickly and makes 4 servings, at about 614 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Meat & Poultry

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

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
Coconut cream is a reliable plant-based alternative to dairy cream.

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

My Personal Notes

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Portobello Roast Beef Hoagies

Tips for the best results

Variations & substitutions

My Personal Notes

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