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 Grilled Roast Beef Sandwiches?

You need 11 ingredients. The key ingredients include: 1 medium onion, sliced, 1 medium green pepper, sliced, 1/2 lb fresh mushrooms, sliced, 3 cloves garlic, minced, and more.

Is Grilled Roast Beef Sandwiches suitable as meat & poultry?

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

How do I store leftover Grilled Roast Beef Sandwiches?

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

Grilled Roast Beef Sandwiches Recipe

Name: Grilled Roast Beef Sandwiches
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 medium onion, sliced; 1 medium green pepper, sliced; 1/2 lb fresh mushrooms, sliced; 3 cloves garlic, minced; 2 tablespoons vegetable oil; salt and pepper; 8 slices sourdough bread; 16 slices colby-monterey jack cheese or 16 slices swiss cheese; 8 slices deli roast beef (or left-over roast beef, sliced thin); 1/2 cup butter or 1/2 cup margarine, softened; garlic salt

Try this homemade Grilled Roast Beef Sandwiches recipe the whole family will love. Made with onion, green pepper, fresh mushrooms and garlic. Easy step-…

This Grilled Roast Beef Sandwiches relies on simple, everyday ingredients such as medium onion, sliced, medium green pepper, sliced, fresh mushrooms, sliced and garlic, minced. It comes together quickly and makes 4 servings, at about 932 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.

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

My Personal Notes

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Grilled Roast Beef Sandwiches

Tips for the best results

Variations & substitutions

My Personal Notes

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