Split Pea and Greens Soup

INGREDIENTS

• 1 pound green split peas (about 2 1/4 cups), rinsed and drained
• 1 large sweet onion, cut into 1/4-inch dice
• 3 large carrots, cut into 1/4-inch dice
• 4 large ribs celery, cut into 1/4-inch dice
• 5 fresh thyme sprigs
• 1 4 oz. thick-cut lower-sodium ham steak, diced (about 1 cup)
• Salt and pepper
• 1 large bunch kale, stems and ribs discarded
• 1 tablespoon red wine vinegar