Hi!
For me it works best to do it over a longer period, not only one meal. One day of trying to stay full works good for me, so the belly is used to the amount of food when the big stuffing comes in the evening.
There food that's easy to chew should be preferred, not to get tired of chewing. So noodles, Lasagna, ... is all fine.
Andy vary a lot, so the feeling of full does not come too fast by realizing having eaten a huge amount of one thing.
Then pudding and yogurt fills the last remaining spaces. After a break, drinking tea (something without bubbles) can also stuff out the last remaining bit of capacity

The last part of the meal should be done standing or leaning forward onto the table, it increases the capacity by a lot!
And: if you rub the sides of her belly, it sometimes also helps to get rid of the "full" felling and get some more bites in.
If you had a nice and full day, some result pics would be wonderful(l)