The Catholic Mass is, admittedly, a stylized Seder if you will with the lamb being the Lamb of God, Jesus' body and blood.
Just prior to the reception of holy Communion the priest elevates the unleavened bread above the cup of wine that Catholics believe is in actual fact the body and blood of Christ with only the appearance of bread and wine. The then says:
Behold the Lamb of God,
behold him who takes away the sins of the world. Blessed are those called to the supper of the Lamb.
And together with the people he adds once:
Lord, I am not worthy
that you should enter under my roof, but only say the word
and my soul shall be healed.
While this may not be as overt as this man's teaching but in is the teaching of the Catholic Church that every Eucharistic celebration is the Paschal mystery with the one of the Easter Vigil (on the evening before Easter Sunday) is the pinnacle.
Edit- Easter is only called that in English speaking countries for some odd reason in honor of Eostre a western German goddess of spring. Nearly all other countries and languages use some form of Pascha.
A snip from:The Theological, Spiritual, and Practical Meaning of the Eucharist
by Benedictine Fr. Thomas Acklin Senior Fellow of the St. Paul Center for Biblical Theology and Director of Counseling at St. Vincent Seminary in Latrobe, Pennsylvania
The Last Supper of Jesus was a celebration of the Pasch, the Passover meal in which the Israelites were incorporated into God’s chosen people as they ate the Paschal Lamb before their exodus from Egypt to the promised land. This sacrificial meal grounded a special relationship with the Lord, gave them an identity as his people, and strengthened their covenant with him. Jesus established a new covenant, a new relationship with us, through offering not a lamb but himself, the Lamb of God who takes away the sins of the world. When we do this in memory of him, we do it at a meal, the new Paschal Meal participating in the Paschal Mystery of the Death and Resurrection of Jesus Christ.
www.usccb.org/beliefs-and-teachings/how-we-teach/catechesis/catechetical-sunday/eucharist/upload/catsun-2011-doc-acklin-meaning.pdf
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