Hacer funcionar trigger (Sql) para multiples campos, Sql Server

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create table insumos (
  idinsumo int not null primary key,
  descr varchar(50) not null,
  stock int not null
);
go

insert into insumos (idinsumo, descr, stock) values (1, 'salt', 100), (2, 'pepper', 200), (3, 'meat', 500), (4, 'tomato', 1000), (5, 'garlic', 300), (6, 'pasta', 400), (7, 'chicken', 600);
go

create table plato (
  idplato int not null primary key,
  descr varchar(50) not null
);
go

insert into plato (idplato, descr) values (1, 'pizza'), (2, 'chicken parmesan'), (3, 'tomato soup');
go

create table detalles_plato (
  iddetalle int identity not null primary key,
  idplato int not null constraint idplato_fk foreign key references plato (idplato),
  idinsumo int not null constraint idinsumo_fk foreign key references insumos (idinsumo),
  cantidad int not null
);
go

insert into detalles_plato (idplato, idinsumo, cantidad) values 
(1,1,10),
(1,2,10),
(1,4,10),
(1,5,10),
(2,1,10),
(2,4,20),
(2,6,30),
(2,7,40),
(3,1,10),
(3,2,20),
(3,5,30),
(3,4,40);
go

create table detalles_venta (
  iddetallesventa int identity not null primary key,
  idproducto int not null constraint idproducto_fk foreign key references plato (idplato),
  cantidad int not null
);
go

create trigger [dbo].[Stock_D_Venta]
on [dbo].[Detalles_Venta]
after insert 
as
  set nocount on;

update i
     set i.stock -= t.cantidad
	from insumos i
	join (select dp.idinsumo, cantidad = sum(dv.cantidad * dp.cantidad)
	        from inserted dv
	        join detalles_plato dp
	          on dp.idplato = dv.idproducto
		   group by dp.idinsumo) t
      on t.idinsumo = i.idinsumo;
go

select * from insumos order by idinsumo;
go

insert into detalles_venta (idproducto, cantidad)
values (1,2),(2,1),(3,2);
go

select * from insumos order by idinsumo;
go

View schema
Execution time: 0,05 sec, rows selected: 14, rows affected: 25, absolute service time: 0,22 sec