It depends upon a variety of factors.
Your state of health, what else you have eaten & drank that day, the size of the meal, its total calorie and nutritional content.
Remember that it is possible to only eat solid food once a day but end up having a very unhealthy large meal that contains lots of calories, salt, sugar, transfats and ultra-processed ingredients.
Personally I would never recommend that anyone aim to eat one meal a day regularly over the short term trying to lose weight or on a frequent medium to long term basis as a matter of habit.
Maybe consider implementing a daily calorie deficit and calorie restriction range or trying intermittent fasting for a few weeks instead.