Yes, the sentence is grammatically correct. It expresses admiration for the inventor of the combination of fried eggs and bread, referring to this person as an "unsung hero," meaning that their contributions are not widely recognized or celebrated. The speaker also offers a blessing for this person.
Here are a few possible rephrasings:
1. "Earlier today, I said a prayer for the person who created fried eggs and toast—truly an unsung hero. God