The Mets began that project on Monday by offering new contracts — the one-year qualifying offer — to lefthander Sean Manaea and righthander Luis Severino, both of whom previously expressed interest in returning. “Multiple is what I’m going for.

The Mets have openings in the starting rotation and Severino is coming off a good season, but he could prefer a longer-term deal.

Pete Alonso, Sean Manaea and Luis Severino all have offers for a return to the Mets for next season. All three on Monday received a qualifying offer from the club — valued at $21.05 million for next season — and have until Nov.