Prepare herb bundle: Take the ends of the dill and parsley stems and tie them into a bundle. Set aside for later use in the sauce.
Cook beef and onions: In a pan, cook the ground beef with chopped onions until the beef loses its pinkness.
Add spices and tomatoes: Add cumin, coriander, and some minced garlic to the beef mixture. Then add chopped tomatoes and salt. Stir to combine.
Fold in rice: Add uncooked rice to the beef mixture and fold it in gently, being careful not to overstuff the peppers later.
Add remaining ingredients: Add the remaining minced garlic, tomato paste, and olive oil to the mixture. Stir well.
Add broth and herb bundle: Pour in the broth and a splash of water. Add the herb bundle to the pan.
Stuff the peppers: Carefully stuff the bell peppers with the beef and rice mixture, ensuring not to overfill to allow rice expansion.
Simmer: Nestle the stuffed peppers into the sauce. Cover and let simmer for about 45 minutes until peppers are bright in color and slightly wilted.
Serve: Remove the herb bundle. Serve the stuffed peppers with the savory sauce, garnished with fresh herbs.