Try tweaking like this;
porridge with no fat milk, linseeds and raisins
Full fat Greek yoghurt with berries/seeds
handful of nuts (large)
Make it a small handful, and be careful which nuts you’re choosing, as some e.g. cashews, are much higher in carbs than others - almonds and macadamias are good choices (ideally try and cut these out if you’re trying to lose weight)
mixed veggies for lunch
Salad, with any veg you like, but with something like hard-boiled eggs and cheese as well as an oil-based dressing and/or mayonnaise; grilled halloumi is great in a salad
large bar of chocolate
If you have to have chocolate, increase the cocoa content as much as you can, as well as cutting down the size of the bar. Once you start cutting sugar down/out, you’ll find that your tastes do change, and you won’t necessarily need as much sweet stuff.
something homemade with beans/lentils for dinner (bean chilli, daal etc) with rice/pasta.
Beans are great, especially if you’re a vegetarian, but try and avoid serving them with rice/pasta.
Two of our go-to vegetarian mains are cauliflower cheese (sauce made with double cream and lots of mature cheddar - no flour), or grilled aubergine and courgettes with a garlicky tomato sauce, topped with Parmesan and mozzarella. Served with a green salad.
Rose Elliott has a really good recipe book, based on her Low Carb Vegetarian Diet - some lovely ideas in there.
HTH to give you some ideas.
Also, don’t forget to drink lots of water!