Kale & Gruyere Panini

1 Tbsp EVOO
1 small onion, finely chopped
2 Tbsp balsamic vinegar
1 clove minced garlic
8 cups chopped kale
1/4 cup water
1/4 tsp salt
8 slices thick country bread
Olive oil cooking spray
1 cup shredded gruyere cheese
1 tomato, cut into 8 slices

Heat oil in large skillet.  Add onion and cook, stirring frequently, until golden brown.  Add vinegar and cook until almost evaporated.  Add garlic and cook, stirring, about 30 seconds.  Add kale, water and salt.  Stir, cover and cook, stirring occasionally, until the kale is wilted and the water has evaporated, about 5 minutes.  Remove from heat.  Preheat panini maker.  Coat one side of each slice of bread with cooking spray.  With sprayed side down, spread the kale mixture on 4 slices of bread.  Top each with 1/4 cup cheese and 2 slices tomato.  Top with the remaining bread, sprayed side up.  Press in the panini make until crispy. 

Serves 4

**Despite this sandwich being meat free, my husband said it was good.  But, he would like bacon next time!