Chicken and Portobello Panini

2 plum tomatoes sliced

1 TBS olive oil

1 TBS red wine vinegar

1/2 tsp Italian seasoning mix

1/2 tsp salt

1/4 tsp pepper

1 garlic clove minced

2 large portobello mushrooms

1 large white onion sliced 1/2 inch thick

1 cup grated provolone cheese

8 slices Italian Bread

1 cup shredded roasted chicken

Slice tomatoes and set aside.  In a small bowl combine the oil, vinegar, the Italian seasoning mix, salt, pepper, and garlic.  Whisk well.  Brush both sides of the mushrooms and onions.  

Heat grill pan over medium-high heat.  Place mushrooms and onions onto grill pan and place panini press on top of them.  Grill 4-6 minutes, turning once.  Remove to a cutting board and slice mushrooms and onions.  Set aside.

Grate cheese.  To assemble the sandwich, brush one side of each bread slice with olive oil.  Arrange four slices oil side down on cutting board.  Top half of the cheese.  The arrange with chicken, mushrooms, onion and tomatoes over cheese.  Top with remaining cheese and then put the other slices of bread, oil side up.  Heat panini pan Place sandwich on pan and press with panini press.  Grill 4-6 minutes turning once.