Pupstar I buy lots of eggs, low carb veggies (mushrooms, courgettes, leeks, shallots, celery, celeriac, kale, cabbage, broccoli, cauliflower, baby spinach, salad leaves etc.), and high fat meats (chicken thighs, pork chops, pork belly, beef, lamb, 95% sausages and bacon. Fish is great but tends to be low fat so you always need to add butter or a sauce). I also buy full fat Greek yoghurt, cheeses (check carb counts as they can vary), cream cheese, Peperamis, olives and when on Bootcamp Light, salted almonds and 85% dark chocolate.
Breakfasts are Greek yogurt and a small quantity of defrosted mixed berries (only on Bootcamp light) or eggs or both depending on hunger. Lunches are salad with homemade vinaigrette or mayonnaise. Dinners are meat or fish and two portions of vegetables. The vegetables should either be cooked in fat or if I steam e.g. broccoli then I pour melted butter over it. Snacks are olives, leftover meat, Peperamis, celery dipped in Philadelphia, kale crisps and chicken wings (check they aren't in a sugary marinade, ideally less than 5% carbs).
HTH