Golang InvalidIfaceAssign when trying to implement an interface

Question

This feels like a 101 question, but I'm still stumped by it. I have the following:

type ITable interface{}

type Table struct{
    Ref bigquery.Table
}

type IQuery interface {
    SetUploadOptions(table ITable)
}

type Query struct{}

func (s *Query) SetUploadOptions(t Table) {
    // Use t.Ref here
}

func New() IQuery {
    return &Query{} // Causes InvalidIfaceAssign
}

and get the following:

cannot use &(Query literal) (value of type *Query) as IQuery value in return statement: *Query does not implement IQuery (wrong type for method SetUploadOptions)
        have SetUploadOptions(t Table)
        want SetUploadOptions(table ITable)compilerInvalidIfaceAssign

AFAIK Table implements ITable, though from reading it may be that it actually implements a pointer to ITable. Either way, I need to use the concrete type Table in SetUploadOptions because I need an underlying Ref property of Table.

What am I doing wrong?