[{"_id":{"$oid":"63b6da81661f0ecd23cd9830"},"Plan":[{"_id":{"$oid":"63b6311e0871625f7ceb85ad"},"Name":"Straight ankle lock","Date":{"$date":{"$numberLong":"1672725600000"}},"Notes":"Christian taught ankle locks","TeamId":{"$oid":"63a291ebb60592854e23b8fb"}}],"User":[{"_id":{"$oid":"6240fd2ee1335b45680bee9d"},"FirstName":"Test","LastName":"User","TeamId":{"$oid":"639fd03bb31c7995a9d4b28c"}}]}]

db.collection.aggregate([{$project:{_id:1,PlanName:{$first:"$Plan.Name"},UserName:{"$concat":[{"$first":"$User.FirstName"}," ",{"$first":"$User.LastName"}]}}}])