Spread goat cheese on each sandwich half. Drizzle each sandwich half with about a teaspoon of the balsamic glaze. Place the pear slices on top of the drizzled goat cheese - it's OK if the pieces overlap a little. Top the sandwiches with the second slice of bread. Spread a bit of butter on both sides of the sandwiches.
In a large skillet, cook the grilled cheese sandwiches over medium-low heat for about 3-5 minutes per side, or until the bread is a nice golden brown and the goat cheese softens and starts to melt. Remove from heat, slice in half, and enjoy!
Notes
Please use cut-proof gloves when using a mandolin! Mandoline injuries are no joke.