The base of this dahl is a great base for a curry as well. Add an extra tomato and crush them up to help them break down into the sauce. Alternatively use a small packet/jar of plain tomato sauce. Instead of reducing at this point, omit the lentils and replace with meat or vegetables (potato/cauliflower - aloo gobi) simmering on low, covered until tender and cooked. Add a splash of water as needed. If you happen to have yogurt stir in a 1/4 - 1/2 cup. Serve over rice (basmati).