Just like vegetables, this can be as simple or as complex as you want it. Maybe you’re just making sure there’s a protein source at each meal (if it was lacking before). Maybe you’re figuring out rough portion sizes. Maybe you’re taking it to the max and actually weighing your food. The point is, you should be including it throughout the day and week.
Very happy with the results, I incorporated my own food tastes and mixed them with lots of veggies, fruit, kale, spinach and romaine lettuce, a huge salad everyday, no sugar, no white flower, no bread other than 100% wheat a couple times a week, cut out soda entirely. Greek yogurt every day, berries, only sweeten with honey. Old fashioned rolled oats, etc etc. I didn't use any of the recipes, too complicated, and costly too! I have lost 30 lbs from January 5th to now. I didn't exercise the first 2 months wanted to make sure I was losing from the food. I then started walking 2-5 miles 3 times a week - 15 pounds to go to my goal.