Balsamic Blueberry Grilled Cheese Sandwich recipe

This amazing recipe I founded at and I love it. This Sandwich is perfect for breakfast. Blueberry are very healthy and delicious in the same time. Yummmmmy :) 


2 slices of bread (I used sourdough)
Plenty of white cheese (I used Havarti, but lots of different  cheeses would be good! Mozzarella, Monterey, Swiss, or Sharp White Cheddar would be yummy. I have been meaning to try goat cheese!)
Fresh spinach or arugala 
1/2 cups fresh or frozen blueberries
1 tbs balsamic vinegar
1 1/2 tbs. brown sugar