I think these are much tastier than a regular grilled cheese. Pictured here are the "bread" slices after you've baked them. The recipe below is enough for two sandwiches.
1 head cauliflower (white or orange)
1/2 cup shredded mozzarella (real, soy, or rice, doesn't matter)
1 egg
1/2 t. salt
1/4 t. pepper
olive oil
butter
1/2 c. shredded pepper jack, cheddar, or whatever cheese you prefer
Steam the cauliflower until easily mashable. Mash with a potato masher until smooth.
Squeeze out the excess moisture in a towel or cheesecloth. (This part SUCKS but it's critical or your bread will be too wet.)
Mix cauliflower with mozzarella, egg, salt and pepper.
Lay parchment paper on a baking sheet. Spread with olive oil.
Make four "bread" slices.
Bake at 450 for 16-20 minutes until browned as pictured above.
Spread butter on slices. Carefully remove bread slices from parchment and grill your sandwiches as usual, buttered sides on the outside of the sandwiches. Serve with a flavorful soup for dipping!