I like induction cooking as well, but it's not _that_ fast. Assuming a 3 kW (usually it's less powerful) induction stovetop, 7 kg of water, 4 J/(g.c) specific heat and 90 C temperature increase, that would take at the very least 14 minutes. Should take longer if you include heating the pan itself, phase change energy and heat losses. If you wanted to do it in two minutes, that would take twice as much power as a home Tesla charger. Heating water just takes a ton of energy.