Yossi Feintuch: Isaac's blessings to Jacob and Esau focus on produce, not on animals

in the he classical Levitical text on a gift (mincha) to God (Ch.2) the plant-based tribute serves not only as alternative to animal offerings, but even as superior to the latter. Notably, Isaac does erect an altar for God in Beersheba, but like in the  majority of altar-building by his father Abraham, no animals are slain there (Genesis 26:25).