TexMex vegetarian cheesesteak sandwiches

individual baguettes or submarine rolls

oil

onion, (sliced)

bell pepper, (sliced (I used red))

~ 6 medium mushrooms, (sliced)

ground cumin

smoked paprika

slices spicy cheese

slices gouda cheese ((or other mild cheese))

To serve: fresh avocado, (sour cream (optional))