In Jainism, eating meat is not allowed, so there is no legitimate "Jain Chicken Biryani." A Jain-friendly version would be a vegetarian biryani made with vegetables (and optionally paneer or tofu) instead of chicken.

Simple Jain-friendly vegetable biryani idea:

• Base: basmati rice, vegetables like carrots, beans, peas, cauliflower, bell peppers
• Flavor: onions (if you avoid onion/garlic for strict vows, skip them or use asafoetida), ginger-garlic substitute (or omit), cumin, coriander, turmeric, garam masala, chili to taste
• Protein options (optional): paneer or tofu
• Aromatics: saffron soaked in warm water or milk, fresh cilantro
• Method: parboil rice, sauté vegetables with spices, layer with partially cooked rice, drizzle saffron water, trap aroma with a lid and gentle steam until done

If you’d like, I can tailor a Jain-friendly recipe (completely onion/garlic-free, dairy-free, or with paneer) to your preferred ingredients and spice level.