INGREDIENTS
1
loaf French bread
8 oz
. mushrooms; sliced
1
small onion; sliced
1 tbsp
. fresh parsley (, chopped)
1 lb
. ground beef
2 tbsp
. yellow mustard
1 clove
garlic; minced/grated
1/2 tsp
. dried thyme
Salt/pepper
1 tbsp
. extra virgin olive oil
8
slices Swiss cheese