To get water boiling, the pots with the carrots and potatoes had to be started on this burner, then transferred to a lower-intensity burner.
(the pots with the carrots and potatoes; to be started; L:on this burner) (this burner; transferred; to a lower-intensity burner; T:then)
the pots with the carrots and potatoes this burner
to be started transferred
L:on this burner
to a lower-intensity burner T:then