John Lightfoot on Luke 24:30

[He took bread, and blessed it, &c.] It is strange that any should expound this breaking of bread of the holy eucharist, when Christ had determined with himself to disappear in the very distribution of the bread and so interrupt the supper. And where indeed doth it appear that any of them tasted a bit? For the supper was ended before it began.

"If three eat together, they are bound to say grace"; that is, as it is afterward explained, "One of them saith, 'Let us bless': but if there be three and himself, then he saith, 'Bless ye.'" Although I do not believe Christ tied himself exactly to that custom of saying, 'Let us bless'; nor yet to the common form of blessing before meat; yet is it very probable he did use some form of blessing, and not the words, 'This is my body.'