Seared Pork Loin And Blackberries - cooking recipe

Ingredients

1 tsp. sugar
1/4 c. unsalted butter
1 Tbsp. balsamic vinegar
2 medium sweet yellow onions, sliced thin
1 1/2 to 2 lb. pork loin roast
salt and pepper
1 c. fresh blackberries

Preparation

Place sugar, 2 tablespoons butter, vinegar and onions in heavy skillet over medium-low heat.
Stir to coat well.
Cook uncovered 20 minutes, stirring occasionally.