Answer

Generally, no. Jain sadhus and sadhvis do not consume tomatoes, whether they are mixed with dal or with dahi.

Explanation

In Jain monastic life, food rules are very strict and based on ahimsa. Tomatoes are usually avoided by Jain monks and nuns in most traditions, along with many other foods that may involve harm to living beings. If a tomato is added to dal or dahi, the whole preparation is normally also avoided.

Spiritual Understanding

For Jain sadhus, food is not only about nourishment; it is also about non-violence, restraint, and purity in practice. Their diet is kept simple so that even subtle harm is minimized.

Takeaway

For Jain sadhus and sadhvis, tomato-containing food is generally not accepted, even when mixed into dal or dahi.