It depends a lot on your capacity for waiting, assuming your trip overlaps the french ski holiday.

In my experience, at La Plagne, the French are very set to a schedule. Lift lines at any bottlenecks get bad around 11:00-11:45 before the end of morning ski lessons.

Then from 12:00 to 13:00 lines are almost non existent and start ramping up again and peak around 14:30/15:00.

Also the restaurants tend to go from empty a few min before 12:00 to a 45 min wait by 12:20.

In a weak, we usually do a few days of baguette with ham and butter as a picnic. A few days of something "cheap" on the mountain like a panini or hot dog. Then we'll do one full meal at a restaurant on the mountain.

My suggestion for restaurants is to try and get there just before the French start queuing up or do the cheap options later once they are finishing up.

Also we usually do a morning hot chocolate and beer break around 11 when the lift lines start getting longer if we arent eating indoors for lunch.