Creamy Philly Steak and Cheese Soup

Melt butter in a large pot over medium heat. Add onion, bell pepper, and mushrooms; cook until tender, about 5 minutes.

Add flour; cook for 5 more minutes, stirring constantly, until flour turns golden.

Gradually whisk in milk and bring to a simmer. Cook until thickened, stirring often, around 5 minutes.

Reduce heat to medium-low. Add beef consomme, salt, and black pepper. Simmer for 5 minutes, stirring occasionally.

Slowly add provolone cheese, stirring until melted, about 3 to 5 minutes.

Off heat, stir in roast beef.