Braised Beef Brisket

Ingredients

• 2 1/4 lb beef brisket, trimmed, cut into 1 inch pieces
• 2 tbsp vegetable oil
• 1 None Spanish onion, thinly sliced
• 2 cloves garlic, minced
• 3/4 inch fresh ginger, grated
• 2 tbsp fish sauce
• 1 tbsp dark soy sauce
• 1 tbsp light brown sugar
• 1 tsp five-spice powder
• 2 (4 inch) stalks fresh lemongrass, halved crosswise
• 5 oz green beans, coarsely chopped
• 3/4 cup crushed peanuts
• 1/4 cup loosely packed fresh Vietnamese mint leaves