The rule of BSD and if you want to get rid of the pre-diabetes, is to avoid starchy carbs. So no bread, rice, pasta, deffo no breakfast cereals except oats (the pure not ready made) and obviously no sugar. You have to watch out for things that you dont think will be high in carbs, they can creep in – i.e. an apple has 29g of carbs which is a lot if you are keeping to 50g daily.
As for recipes, just eat what you would normally but without the carbs. Tonight I have had lasagne but instead of pasta sheets I used part cooked aubergine (can use strips of courgette) but everything else was the same as normal lasagne. Obviously if your normal is carbs on carbs then you will struggle. Look at the recipes and weed out what you don’t like then see what is left. Even if you have to live on soups and eggs for a week do not go the ready meal path, they are all bad for you, even the diet ones. In fact, avoid anything that says diet, low fat, low sugar. It is a con and they have put other things in that are worse for you.
Can I also say that with your diagnosis of pre-diabetes this cannot be a quick fix, yes you want to lose weight but it is more important to get your blood glucose under control before the medics step in with medications – a very slippery slope.