Ingredients
1.5 lbs ground chuck
1 c finely minced baby Bella mushrooms
½ c finely minced onion
2 T minced fresh basil
(1 T balsamic vinegar, ½ t salt)
Sliced provolone cheese
5 Ciabatta buns, split and toasted
Pesto Mayo:
½ c mayonnaise
2 T basil pesto
Shredded romaine lettuce
2 Roma or plum tomatoes, thinly sliced
Preparation
