Take another look at the sentence:
If Eli hadn't escaped to the kitchen to cool down, he would have __________ a heavy plate over the head of Mrs. Jones, who sent back her chicken for the fourth time.
The sentence requires the past participle of break, an irregular verb. Broken is the past participle.
|Verb||Simple Present||Simple Past||Past Participle|
Breaked, the form you chose, is a spelling error. Before you continue, review the rules for irregular verbs.