Tomato uthappam tastes yummy. It comes out very soft. The recipe is from Sujatha's Spicy Khazana.
I added a few more ingredients according to my taste.
Tomato juice(grind about 3 tomatoes in the mixer without adding water)-2 to 2.5 cups
Besan flour-3/4 cup
Chilli powder-1/4 tsp
Coriander leaves-1 tsp chopped
Onion(finely chopped)-1/4 cup
Mix all the ingredients. If the batter is very thick, add little water. It should be like dosa/uthappam batter.
Make small uthappams the usual way.
I had them with a dollop of coriander hummus(chutney)