Cut zucchini in half and hollow out pulp. Combine rice, ground beef, salt, allspice and black pepper. Mix well. Fill each zucchini with rice mixture. In saucepan, bring 3 cups of water to boil, add chicken bouillon. tomato paste and garlic clove. Add stuffed zucchini to boiled water, cook for 10-15 minutes or when stuffed rice is well cooked. Add grind dried mint leaf for garnish.