The best way to have total control over the meal plans is to find a bunch of foods and recipes that you know you'll like or you want to try, set them to recur "often" in a meal, and have the meal only use your recurring foods. Ideally select 15-20 foods if you want some variety, and the generator will build your meal plan from only those foods. A good routine is to set Breakfast to always have one or two staple foods that you like, lunch to have a handful of foods that you like to rotate between (or a standard restaurant meal if you eat out), and leave dinner a suprise that will round out your nutrition targets with whatever nutrients are missing.
We may add more frequencies other than "always" and "often" later, but if you just want something to recur only slightly more often than normal, click the heart icon to favorite it.
If you want it to never show up, use the "block" button.