Heat oil in a pan, put fennel seeds & ginger, garlic, chili paste and fry for few minutes. Then add onions fry until golden. Add mashed potatoes & steamed beetroot and fry well. Then put all the powders (chili, garam masala & dhania) & salt. Mix well and saute for 5 minutes. Remove from heat and allow to cool. Add 1/4 cup of Rusk powder to this veg mixture and mix. Make lemon sized balls out of this mixture. coat with rusk powder. Flatten this into thin patties. Heat 2 tbs of oil in a shallow frying pan and fry few cutlets at a time until both sides becomes brown (turn it once). Repeat this until all the cutlets are fried (Pour some oil every time you replace the cutlet). Serve hot. Green Chutney (Mint) & Tomato Ketchup makes a good accompaniment.