Kurdish Dumplings in Yogurt

Ingredients

• 2 tablespoons vegetable oil, plus more for oiling
• 3/4 pound ground beef
• 3/4 pound ground lamb
• Salt
• Pepper
• 1 medium onion, minced
• 1/2 red bell pepper, seeded and minced
• 1 small celery rib, minced
• 2 large garlic cloves, minced
• 1/4 cup minced parsley
• One 14-ounce package Cream of Wheat
• 2 cups graham flour (see Note)
• 2 cups warm water
• 5 cups full-fat plain yogurt
• 5 cups chicken stock or low-sodium broth
• 1 tablespoon dried mint
• 1/4 cup finely chopped dill, plus more for garnish
• 1/4 cup finely chopped cilantro, plus more for garnish
• 1 1/2 tablespoons fresh lemon juice