Place the bread slices on a flat work surface. Spread 1 tablespoon of butter evenly over one side of each slice of bread.
Warm a skillet over medium heat for 3 to 5 minutes. Layer each sandwich as follows: Slice of bread, butter side down, 1/2 cup shredded Gruyere cheese (or 2 slices), 2 pear slices, 1 tablespoon honey, 1 small handful spinach, 1/2 cup shredded Gruyere cheese (or 2 slices) and slice of bread, butter side up.
Place sandwiches onto the hot skillet. Cook on each side for about 3 to 4 minutes, or until the bottom layer of cheese begins to melt around the edges. Cut in half and serve!