He suggested that the five loaves represented the Old Law in the five books of the Pentateuch, and the two fish represented either the great prophets Isaiah and Elijah, or Moses and Abraham.
And the "multiplication of the loaves" represented the endless abundance of God's grace as manifested in Jesus Christ. This grace is so abundant and so far beyond the comprehension of the followers of Christ at the time that they could not "eat" it all (i.e., they could no understand it fully). So the twelve baskets of leftovers represented the grace which would be "eaten" by the human race later -- through the continuation of salvation history through the Church in its mission on earth (i.e., the Twelve apostles).
Interesting take on it. Just as Jesus does on the Sermon on the Mount, takes the old “rules” and expands them. But expands them so much that it requires God’s power and grace to meet them.
Beautiful!
never heard this interpretation but like it.