Easy Slow Cooker Irish Stew

Ingredients

• 2 ½ pounds boneless sirloin tip roast, fat trimmed, cut into 1 1/2-inch pieces
• ¾ cup all-purpose flour
• ¼ cup vegetable oil
• 8 cups less-sodium beef broth
• 1 ½ pounds baby red potatoes, quartered
• 2 medium leeks, halved lengthwise and sliced 1/2-inch thick
• 1 medium yellow onion, cut into wedges
• 2 cups baby carrots
• 1 cup barley
• ¼ cup coarsely chopped fresh parsley plus additional for garnish
• 1 ½ cups frozen peas
• 1 teaspoon kosher salt
• ½ teaspoon ground black pepper