Pesto Chicken Sandwiches

This is another new recipe that we haven't tried, but I thought it might be fun and we LOVE pesto. Also, the french bread that they bake every day is only $1.69 so it's not super expensive.

Pesto Chicken Sandwiches
3 chicken breasts, cut into chunks
1 (8 oz.) pkg white mushrooms, sliced (I'll be leaving these out)
1 onion, sliced thin
1 1/2 - 2 c. mozzarella cheese, shredded
1/4 c. peso
1/4 - 1/2 c. ranch dressing (optional)
Montreal Steak Seasoning (about 1 tsp.)
1 loaf french bread

Saute the sliced onion and chicken pieces in a little butter or olive oil until the onions are soft and the chicken is cooked through. Season with Montreal Steak seasoning (or salt and pepper). Once onions are soft, add mushrooms to the pan with the chicken and onions, and cook until those are tender. Set meat mixture aside. Cut the french bread loaf in half long way and open up onto a large cookie sheet. Spread a generous amount of pesto on both sides of the bread. Spread ranch dressing (optional) on top of the pesto. Put half of the meat mixture on the top of each half of bread. Top both sides with mozzarella cheese. Bake at 350 for 10-15 min, or until the cheese is golden brown.
Serve folded back together and cut up as sandwiches or open faced.