Musar על בבא בתרא 149:11

The third approach to this meal is based on the mystical dimension behind the "delicacies," מטעמים, that Isaac wanted to taste before blessing Esau in Genesis 27,4. Our sages state that this was symbolic of the meal G–d will prepare for the righteous in the World to Come. The time frame for that event: After the world will have rejuvenated itself and has reached the spiritual level it should have maintained since the time Adam was created, and would have maintained if only Adam had not sinned. At such a time matter will have been so refined that men will need to wear only the כתנות אור, the garments woven of "light," as Adam had done before G–d had to provide him with leather aprons, i.e. כתנות עור. Then indeed G–d's blessing /command in Genesis 2,16 that man could eat from every tree in the garden will be fulfilled. Abraham alluded to this condition when he said to the angels "rest under the tree." He referred to it as representing the tree of life, seeing that at that time in the future death would be banished from the earth.