Kohlrabi in spicy gravy

Kohlrabi is a vegetable which is not too popular with every household.It belongs to cabbage community and has a very strong taste.I love it even raw with a great dip.It tastes very nutty and crunchy.Since I have very few vegetables here,I thought I should try and make this into a curry and add in potatoes so that its not too much of a shock for the kids to see a different vegetable on the plate.But the gravy was so lovely that the curry fell short with rice!The kids ate up quickly and my husband was keen to know was it that was on their plate,well as for me I just smiled and said"magic".

Ingredients
Kohlrabi cut into 1" pcs            1 no
potatoes chopped                     2 nos
green peas                                100 gms
chopped tomatoes                     2 nos
chopped onions                          1 no
garlic peeled                               2 tbsp
ginger chopped                           1 tbsp
red chilli                                      3 nos
black pepper                               7-8 nos
chana dal                                     1 tbsp
tamarind                                       walnut size
sesame seeds                               1 tbsp
methi seeds                                  1/2 tsp
coriander seeds                            1 tbsp
jeera                                            1/2 tsp
mustard seeds                               1/2 tsp
hing                                              1/2 tsp
curry leaves                                  1/2 bowl
oil                                                 2 tbsp
salt to taste                                                      

Method
Heat oil and add hing,methi,coriander,chana dal,sesame seeds,black pepper,red chilli,mustard,half the curry leaves,ginger, garlic,onions and tamarind.Saute them till roasted well.Add tomatoes and cook till a bit of water dries up.Cool and grind to a fine paste.
In another pan, heat oil and mustard seeds and curry leaves and let them splutter.Add the chopped kohlrabi and potatoes and let them saute well.Pour in the paste and mix well.Add the peas and salt to taste.Adjust water .Cover and cook till vegetables are soft.Top with coriander leaves and serve with rice.