Grilled Summer Veggie Open-Faced Sandwiches

toasted walnuts

unsalted butter, at room temperature

coarse salt

large portobello mushrooms

eggplant, thinly sliced

zucchini, thinly sliced at an angle

olive oil

Salt and freshly ground pepper

cheese such as mozzarella or fontina

slices whole grain bread (such as

ciabatta

)

Fresh greens (lettuce, spinach, arugula, etc.)

ripe avocado, peeled, pitted and thinly sliced

lemon, cut into wedges