Meal plans are a good guide to give you an idea of what to eat with specific measurements based on a calorie target. The macronutrients are spread out in an appropriate way to encourage muscle gain and fat loss.
In addition to these basic meal plans please consider the following
Salt meals lightly (at least two meals per day)
Consume 3L+ of water per day
Stick to lower calorie sauces, salsa, spices, and flavours
If you miss a meal just have it later or combine it with another one
You can swap around the order of meals on the plan. The crucial aspect of it is getting in all of the foods each day, at the listed measurements.
You could have a relaxed meal (or cheat meal) once per week but it would be best to swap out a listed meal for this, and try to maintain some control in regards to total calories consumed. Cheat meals typically set you back if you over indulge. It is best to track your macros to fit in fun foods!