In traditional Jain practice there are variations between communities, but a common rule is to avoid root vegetables. Tomatoes are not a root vegetable, so they are generally considered permissible in many Jain households. However, it can depend on local guidance and the specific samaj (community) you follow.

Regarding masoor dal (red lentils):

• Lentils are legumes, and many strict Jain households avoid legumes as part of their regular diet, especially during certain observances or fasting periods.
• Some Jains, especially in the Shwetambar tradition, may include masoor dal in their everyday vegetarian meals, while many Digambar families are stricter and avoid legumes more consistently.

Key point:

• Digambar and Shwetambar traditions sometimes differ on what is allowed, and individual guidance from your guru or local community should be followed.

If you want, I can point you to specific Jain texts or discuss how these items are viewed in particular Digambar/Shwetambar contexts.