This is normal and happens to most everyone.
At first, you deplete your glycogen stores and the body releases the water that is stored along with the glycogen. That’s your first week loss.
Ok, now that’s gone, and your body needs to try to adjust to burning fat as the other energy source. It is not that good at it yet, because all the metabolic pathways are not set up to do that efficiently.
However, it will get busy creating those metabolic pathways. Just takes some time, and it is a process of gradual improvement.
During that time, you need to provide your body with enough energy to function, so that’s going to come from your dietary fat intake. It helps set up the fat-burning metabolism and keeps you from feeling empty/hungry all the time when you first start.
Over the next few weeks to months, your body starts to get good at using fat as a primary fuel source, and it will start using stored fat in addition to what you eat. This is about when you start to feel a natural reduction in food cravings and you may find you can go for longer periods, even surprisingly long, without really needing to eat anything.
Again, a gradual process that starts at about week 4 and progresses through about the first 6 months or so.
For me, I lost a lot of weight in weeks 1 and 2, gained a little in week 3 and 4, and then started losing more steadily after that. By about the end of week 4 is when I noticed I could skip meals and not need to snack, and by about week 12, my energy levels were pretty steady all day and I felt “normal” all of the time.
It is so common there is even a term from it from the original Atkins diet - the “post induction stall syndrome.”
It’s just part of the adjustment process. Nothing to worry about. In the early stages you should be eating more than 775 calories a day. You want to eat enough fat and protein so your body has the essential nutrients, and enough energy to keep going.
That chicken + broccoli + cauliflower sounds like a great lunch or dinner. Just add bacon and eggs for breakfast, and a steak and salad for the other meal and you’re set.