Newbie here - need inexpensive/easy meal ideas

My shopping budget is £50 , got frozen diced beef and frozen diced lamb, frozen veg (broccoli, cauliflower) , 2 packs frozen chicken, 2 packs frozen meatballs , 2 packs of frozen fish, sweets and crisps for my wee one , butter , cheese, eggs, cleaning stuff and was under (I am on ketone) just some ideas.

How are you kids about veggies if they're mixed in with pasta? I make a really simple pasta primavera and incorporate different kinds of veggies my family likes into it. I based it off this recipe: https://www.organizedisland.com/pasta-primavera/

It doesn't use cream which helps with calories. Sometimes I use butter like it says but a lot of times I'll just use 1/4-1/2 cup of milk. The Parmesan makes it taste so yummy. I didn't follow that recipe exactly ingredients wise but it's a great starting point. I add cubed chicken breast too to bulk it up a bit.

Also check out skinnyms.com! She has a ton of recipes with the calories usually listed. You can browse by different categories which makes it very easy to navigate around!
But of course it's hard to give up skyline I lived in the area for several years and skyline became quite the staple in my diet

Use the recipe builder for things you already eat. It will figure out the calories in it for you.

I'm obnoxious about it and will enter everything and then weigh the entire amount and make that the number of servings.
So if i make something and it weighs 1200g then it's 1200 servings and if I eat 250g then it's 250 servings.

It allows me to eat what I always did just usually less of it.

I have also been known to batch cook myself some meals on a Sunday and eat those all week (ex make some chicken Sunday and eat that all week) regardless or inplace of SOME of what your family is eating? then they can eat what they like and maybe you have a small portion and some chicken?