Meaty portobello cheesesteak sandwiches! Hearty, filling hoagies filled with portobello mushrooms, caramelized onions, and peppers. This portobello cheesesteak sandwich is a hearty, meaty sandwich and the perfect vegetarian option for my friends who crave old, delicious meals like I do. These portobello mushroom sandwiches are perfect for weeknight dinners—a big sandwich covered in caramelized onions,...
