TheFork users who ate in Montreuil have said really good things about Bamboo & Sum, Amor y Pan and Curry House. Maybe you should give them a try!
Some of the more popular Ethnic restaurants where you can go with your family in Montreuil according to TheFork users include:
Bistrot du Marché, with a 9.5 rating
La Grotte, with a 9.4 rating
Eat sushi, with a 9.3 rating