DataSource Controls :: Linq To Entities - Multilevel Projection Into Business Class And Not Breaking Deferred Execution?

I have a problem. (this a simplfied example)

In Entity framework I have a class which is effectively

fooEntity
{
public Guid Id {get; set;}
and a collection of fooChildEntity
}
a fooChildEntity is again an entityframework class
fooChildEntity
{
public Guid kidId {get; set;}
}

Now I also have a pair of business layer classes foo and fooChild

foo
{
public Guid Id {get; set;}
ilist<fooChild> Children {get;set;}
}
fooChild
{
public Guid kidId {get; set;}
}

My aim is to write a linq to entites that will allow me to convert the entity foo and children into the business foo and children without breaking deferred execution ( I will be adding filters to reduce the recordset at a higher coding level in the business layer)

doing something like

this.context.fooEntity

.include(fooChildEntity)

.Select( fe => new foo { Id=fe.Id ,

fe.foreach(fec => Children.add( new fooChild { kidId = fec.kidId}))})

.AsIQueryable()

is plainly rubbish and would never compile - it is however an indication of the direction I was thinking .

Even if I got a foreach to work like that or similar it would break deferred execution

At this point there are around 300,000 foo entities which I will eventualy filter to 5 or 6 foo's - this is why deferred execution is needed.