Barley Stew Recipe with Caramelized Onions, White Beans & Spinach

INGREDIENTS

• 2 tsp olive oil
• 2 medium yellow onions, cut in half & thinly sliced
• 1/4 cup water
• 1 tbsp balsamic vinegar
• 3 garlic cloves, minced
• 3/4 tsp dried thyme
• 1/2 tsp kosher salt
• 1/2 tsp ground pepper
• 1 (14.5 oz) can diced tomatoes, including juices
• 1 cup pearl barley
• 4 cups vegetable broth, plus more for thinning
• 1 (14.5 oz) can cannellini beans
• 3 cups (packed) fresh spinach leaves
• Salt and pepper, to taste