Use the onions and pepper and tomatoes paste to make a nice stew. Then add in your rice, and green peas, let it cook until is fully cooked. You will get that red colour in you see. No food colour needed

Then for the green rice, heat little oil on the pot and fry the per boiled rice, with spices and chili powder, salt and seasoning, then add in the colour and hot water, stir and cover the pot let it cook perfectly.