In a large skillet, on medium high heat, throw in your asparagus, onion, mushroom and red pepper with some olive oil and balsamic vinegar. Sprinkle some salt and pepper on top for seasoning.
Cook the veggies until they're soft and a little wilted. Take off heat.
Take your loaf of focaccia and cut the ends off. Then cut the bread in half, long ways, then slice the bread in squares.
Use a knife and spread a heaping amount of hummus on side of the bread. Put the provolone cheese on. Repeat for the other slices of bread that are going to be the tops of the sandwich.
On a baking sheet, put the bread with the cheese/hummus, cheese side up and put in the oven with the broiler on high. Remove once the cheese has melted.
To assemble your sandwich, load up the veggies on the slice of bread that's the bottom side of the sandwich. You can add more hummus if you want.
Put the bread with your cheese on top and smush it.
At this point, if you're using a panini press, go ahead and put it on the panini press and heat it until there are nice sear marks on the outside of your bread..