For colorful veggie batter, clean the spinach and blanch in boiling water. Then strain it and make a thick puree without water. To make beetroot & carrot puree, boil the beetroot in a pressure cooker till 3 whistles and peel it. Cut carrots in a small size and grind along with boiled beetroot without water and make a puree. Now in two separate bowl pour one cup of appam batter each and add 4 tbsp spinach puree to make green color batter and in other bowl add 4 tbsp of beetroot and carrot puree to make saffron (orange) color. Mix the batter well in both the bowls separately. Add little water if needed.