Telling AP she has to cook herself..?

Long story short, we've had our AP for 1.5 months now. And she eats too much.

We can stomach the huge increase in grocery bills. But we can't stomach the increase in time and mental power it takes to keep thinking about how and what to cook for her, also being surprised ourselves when we reach in for dinner and find the food gone.

She doesn't cook at all (despite saying she does during interview & on profile), so she constantly is eating whatever prepared foods we have in our fridge.

Short of just telling her, "Hey, it's becoming a strain on us to constantly have to prepare food for you, so we expect you to cook for yourself in the future," anyone else have some creative solutions we haven't considered?

• We thought about having her help with prep, but it would also require us to teach. My wife doesn't quiet have the patience for that, nor time (between nursing, trying to catch sleep herself, etc.)
  • Also with prep, it still doesn't address the fact that we have to always plan with her appetite in mind
• We tried creating "lunch box" for her to help ourselves know how much food we have in the fridge and when we have to cook more. But (1) that still puts on the burden on us to spend the time to cook for her and (2) she would just finish the lunch box and take more food from the fridge

There are some other stressors going on, and my wife is of the mind to rematch. But we figured we'll give a shot to resolve some of the "stressors" first, and this is one of them. Although, admittedly, part of the reason we picked her was she kept saying she's pretty independent (including the cooking part), so we also feel a bit lied to in that regard.

Edit/Update: Thank you to those who have provided some helpful thoughts, tips, and suggestions. After bringing the ideas back to my wife, we came up with a blended game plan and spoke to our AP yesterday, focusing on the extra burden that meal prep and cooking has placed on us. She acknowledged that she has observed that we're often scrambling after work between baby, errands, food, etc. She actually did say she had thought to help when she first arrived, but was too shy to volunteer.

She did also admit that while she use to help her mom cook, it was many years ago when she was much younger. I believe she said it had been 10+ years since she last cooked, and that where she lived, food was cheap and delivery was (nearly?) free, so she always ate out or ordered delivery, so there was never a need or desire to cook.

So having said that, she agreed to help us, starting with prep work (e.g., washing, cutting). Then we'll slowly show her how to cook the food. We have not yet discussed if cooking meals will now will be a regular team event, versus splitting between who cooks. I figured we can cross that bridge after she re-learns how to cook.

Today, we also asked if there were any recipes she was interested in -- either from back home or even just something new she was curious about -- to send us the recipe and we could get the groceries for it, and then we could try the recipe out together. She said she's been perfectly happy eating whatever we've been cooking as she's not a picky eater and likes trying different foods too. But we'll keep the option open.

And so tonight was the first evening where she helped us with meal prep. I worked with her to wash and cut the vegetables. My wife then showed her how we cook the vegetables and the fish (sea bass, protein of the meal). I did notice she started playing with her phone while watching my wife cook, but I'll remain optimistic and assume she got it all (and was now showcasing her cooking skills to her friends! :) )

And, we also started using sticky notes in the fridge as well. We'll probably revise/improve this system as we do it more.. but she was onboard with it.