By using the Löwenheim–Skolem theorem & Mostowski collapse, in every model $V$ of $ZF$$ZF+Con(ZF)$ there is a countable transitive set $M$ such that $(M,\in_M) \models ZF$. Is the following "converse" true?
In every model $V$ of $ZF$ and every transitive set $M \in V$ such that $(M,\in_M) \models ZF$, there exists a transitive set $N \in V$ such that:
$M \subseteq N$$M \in N$
$(N,\in_N) \models ZF$
$M$ is countable inside $N$