Best Panini Grill - What is an easy recipe for a Portobello-Chicken Panini ?

What is an easy recipe for a Portobello-Chicken Panini ?

I'm just starting to cook, so I can't have the recipe complicated, and it would be nice if it was cheap. Thank you.

Cook you chicken breast until done. Stir fry your mushrooms until done. Assemble you sandwich and place on your panini after brushing it with olive oil. Toast until brown 4-7 minutes.