I didn’t add any sugar to my coffee.
I am doing keto OMAD, so even if it were during my eating window, I don’t use sugar, or sweetener. When you are having coffee or tea during fasting, it is okay to have it with a bit of heavy cream because it has very few carbs and will not take you out of your fast, providing you aren’t drinking a lot of cups with cream in it.
One teaspoon of sugar has 4 carbs, but two tablespoons of heavy cream have barely 1 carb, and it has healthy fats that help to keep your tummy feeling satisfied.
Whether you can have cream during fasting is one of the things that people have different opinions about, but most say that it is okay as long as you are not doing it a lot during your fast.
As far as what you can eat in one meal, that seems to be different from person to person, depending on your age, your activity, and other factors that might affect how much food you need each day.