- Chop the cheese; cut the hard stems off the spinach; rinse and drain the cucumber and beets. Now put together the cucumber, beets, spinach, mozzarella cheese, tomatoes, garlic and black pepper in a large bowl.
- Place the bowl in a microwave and then cook for 2 minutes, uncovered until the mixture is warm and the cheese is starting to melt. Arrange the vegetable and cheese mixture on the four slices. Then place the other slice of bread over the mixture and then again top with the remaining cheese and vegetable mixture.
- Now place the remaining four slices at the top of four sandwiches and cut them diagonally across and serve.