Eating before reciting the sutras or not, really, hinges on circumstance.
There are no fixed rules for this. In monastic life, breakfast follows
completion of the morning liturgy. It may not be so at home, where a
light breakfast precedes morning liturgy is acceptable. The only thing to
note is that, however, breakfast even before recitation and prostration is
rightly to be vegetarian in content, like milk and cereal, tea or coffee,
jam and bread, as a show of sincerity and reverence.
If interrupted amidst sutra recitation, take a break, get up to tend
to matters, and then return to pick up where left off. Do not leave
recitation unfinished. Just like taking a break in weaving and then
returning to carry on spinning the yarns in accordance with the pattern
already in place. A decent piece of cloth results. Unaffected. Sutra
recitation likewise. Recite a whole scroll or several chapters, rest, and
then reassume. If interrupted midway due to circumstances, restart
from that particular scroll or chapter. Such is the right approach.