Meals are input by type: vegetarian, fish, chicken etc. There isn’t currently an ‘average’ option, but if the caterer is unable to tell you, and no special requests were made of them (e.g. 100% vegan please!), then a 30% veggie 30% fish and 40% beef or chicken is a good rule of thumb. And if you’ve got people staying overnight, don’t forget to include evening meals!