Slow Cooker Pinto Beans

INGREDIENTS

• 1 pound dried pinto beans
• 1 onion, chopped
• 3/4 green bell pepper, diced
• 2 celery ribs, chopped
• 3 cloves garlic, chopped
• 1 pound Black Forest ham, cubed
• 1 teaspoon ground cumin, or to taste
• 1 tablespoon dried oregano, or to taste
• 2 bay leaves
• 1 tablespoon lard
• 5 cups chicken broth, or as needed to cover