There's a few french chain restaurant and some local places at the Val d'Europe mall and I've always enjoyed my meals at Hippotamus and Ristorante del Arte.
Hippotatamus is a french steakhouse chain with decent prices and quality meats. Currently, that location serves an entrecote (THE french cut of meat) that weighs either 250 grams (8.8 oz) or 330 grams (11.6 oz) for 22.90 euros/29.90 euros. You also have an "Onglet" (Hanger Steak) from Ireland that weighs 200 grams (7 oz) for 24.90 euros. Remember that all those prices are taxes included and with service, so no need to leave an extra tip.
Ristorante del Arte is italian and much better than Vapiano at the Disney Village. The pizzas are quite good, but more of a french style. Thinner crust, no pepperoni as a topping, etc, when compared to an american pizza. If you see "Chevre" on a menu for pizza, it means it will have goat cheese
Near the mall, my friends introduced me to "Au Bureau", an english style pub. The Montevrain location is 1.5 miles away by car from the RER Val d'Europe station and, funnily enough, is run by the same company that owns the Brasserie Rosalie in the Disney Village. Similar dishes at a cheaper price at Au Bureau, so can be worth a look if you don't mind a Uber or taxi ride there.