Here's a shopping list I gave to a friend starting LC not too long ago:

Almond butter
beef roast
Blue cheese dressing
block cheese
Broccoli
Butter
Chicken
cream cheese
cucumbers
Eggs
green beans
green onions
hamburger
lettuce
mayonnaise
Nuts (not peanuts)
peppers
pork chops
Pickles (dill not sweet)
radishes
ranch dressing
Salami
shredded cheese
Sour cream
Spinach
steaks
string cheese
Tuna (canned or fresh)
Whipping cream

And here's a more comprehensive list I found online at ketogenicdietresource:

Meats, Poultry, and Seafood: Staples on a Low Carb Grocery List

A low carb grocery list includes any type or cut of fresh animal products, but for the best health, choose grass fed or organic meats and poultry to avoid antibiotic, pesticide and grain residues. Examples include:

Beef, all cuts such as roasts, ribs, steaks and tips
Bacon, ham and sausage; check carb counts on these meats. Should be 1 carb or less per serving.
Pork, all cuts including roasts, ribs, loin, chops or steaks
Lamb, mutton
Venison and other wild game
Buffalo

Poultry which has been pasture raised is a better choice:

Chicken - whole or parts
Turkey- whole or parts
Duck- whole or parts
Other birds such as Quail, Cornish hens, goose, ostrich
Deli Meats - good in a pinch and better than high carb alternatives on a low carb grocery list (check for added sugars):

Cold cuts such as turkey breast and pastrami
Pepperoni sticks or slices
Salami and bologna
Proscuitto
Seafood: any type or kind. Examples include:

Fresh or frozen fish of any kind, including cod, trout, salmon, swai, tilapia or tuna
Canned fish such as sardines, tuna and salmon, water or oil packed
Fresh or frozen shellfish such as shrimp, scallops or crab

Dairy Products

Eggs
Heavy cream
Sour cream
Cream cheese
Butter
Cheese: hard cheeses such as cheddar and parmesan
Cheese: soft cheeses such an muenster and farmer
Greek yogurt, plain, full fat. Carb count should be less than 7 per serving.

Low Carb Vegetables

Bell peppers
Broccoli
Cucumbers
Cabbage
Cauliflower
Lettuce: large leaves to act as the "bread" for sandwiches
Leafy green vegetables such as spinach and kale
Onions and garlic: for flavorful cooking
Sprouts for salads
Summer squash such as zucchini

Nuts and Seeds

Nuts: coconut, almonds, hazelnuts, pecans, walnuts, and especially macadamias. Nut flours are good to have on hand for baking. These can last a long time if you keep them in the freezer.
Seeds: sunflower, pumpkin and sesame seeds.
Be aware both nuts and seeds are high in inflammatory Omega 6 fatty acids, so don't go crazy with these.

Fruit

Avocados: great snack with lemon juice or balsamic, or make guacamole for dipping low-carb veggies
Fruit: Optional once weight and health are stabilized. Some people can handle the sugar in fruit and still be healthy and slim, others can’t.
If you indulge, pick fresh local fruit in season, and stick to berries such as strawberries, raspberries and blueberries which are lower in sugar.
Eat fresh fruit with a fat (peanut butter, whipped cream, cheese). It slows the blood sugar spike.

Pantry and Condiments

Canned tuna, salmon, crab, shrimp, sardines, anchovies
Vienna sausages, canned luncheon meat (Spam or Treet) (good in a pinch, but go light on processed meats, as real meat is healthier.)
Tomato products: canned tomatoes and tomato paste (look for the brands with the lowest carb count)
Sauces: Pasta sauce, pizza sauce and alfredo sauce with no added sugar or thickeners
Low-carb veggies: green beans, greens, okra (check labels for no added sugar), sauerkraut
Canned vegetables: green chiles, roasted red peppers, chipotle peppers, mushrooms, artichoke hearts, sun-dried tomatoes in oil (a little adds lots of flavor), hearts of palm
Chicken and/or vegetable stock
Nut butters (natural, unsweetened). These need refrigeration after opening.
Sugar-free dill pickles or relish: use for tuna or egg salad
Mustard (except sweetened mustards, especially honey mustard)
Cider and wine vinegars (use balsamic vinegar sparingly)
Most bottled hot sauces (such as Tabasco)
Most salsas
Tamari soy sauce (avoid soy sauce if you are gluten sensitive)
Mayonnaise – look for the brands with the lowest carbs
Sugar-free salad dressings
Capers
Horseradish
Olives
Lemon or lime juice (1 gram of carb per tablespoon)
Pork rinds (crushed, these are a good substitute for bread crumbs)
Beef jerky or beef sticks

@SoosannahK I have never thought to do that either. That's brilliant! I suggested to another friend to use mint extract in a smoothie for chocolate mint but didn't even think to do that with my coffee. I'm so stealing this idea thanks for sharing

My food list:

Chia seeds.
Eggs
Wasabi flavoured sesame seeds
Seaweed nori, avocado, cucumber, prawns (I make hand rolls)
Salmon, chicken and/or a white fish
Canned tuna for lunches
Green leafy veg such as kale, spinach, brussel sprouts, broccoli, and arugula
Cauliflower
Coconut oil
Olive oil
Greek yoghurt
Philadelphia cream cheese or HWC
Coconut milk and coconut cream
Almond milk (unsweetened)
Benefiber (until i build up enough fiber thru' leafies)
Maccadamias, almonds or cashews. In small groups for emergency rations in my handbag.
Pickwicks rooibos tea (liptons is too sweet imo)

I am yet to use the almond flour that I bought. I am trying to eat fresh foods where practical. Love bacon and dutch rookworst so they are a once a week item. Red meat is also a once a week or so pricey addition.

BTW this morning I perfected my loaded hot chocolate: 3g cocoa, 5g dark chocolate, 12g choc protein powder, 40g HWC, 10g coconut paste, 100ml coconut milk, 10g benefiber, 150ml boiling water. Blended then add heat in microwave. 350cals kept me full for over 5 hours, despite walking the dog and obligatory post walk cafe visit at 1pm where I had just a cup of tea. 330pm lunch.

@mormas I'm in the UK, I tend to keep things pretty simple though and mainly just by raw ingredients and I shop my local farms as much as I can. I've managed to find most of the foods I can't get at the grocery store on Amazon and at my local Asian grocery store, in particular: Shirataki Noodles, Bonito based miso soup (lower carb than normal miso soup), coconut oil, ghee, nori, almond flour, Quest bars, nutritional yeast and various seasonings and spices. I also go to a local oil shop to buy my extra virgin olive oil, they import single estate olive oil directly from the farm, so it's as close as I can get to feeling safe buying olive oil in the UK.

@lowjax75, @SoosannahK, @SamandaIndia, @auntstephie321 Your lists ROCK! Nice job!

SamandaIndia mentioned Pickwicks rooibos tea, I would just add to try as many herbal teas and experiment with green tea, oolong tea, and of course the obvious, Water --bubbles or no bubbles.

Canned salmon was mentioned, I also have done smoked salmon and rolled it with cream cheese for lunch. This thread is a keeper!

I use a lot of tinned mackerel for lunches, small leafy salad & a boiled egg. Is so filling.

For UK people;

Tinned mackerel in brine or oil
Lamb cutlets
Full fat greek yogurt
Cream cheese (Boursin minis are like little fat bombs)
Sour cream
Extra thick double cream
Spinach
Caverelo nero cabbage
garlic
onion
Cheddar
Bacon
Pickles
Kerrygold butter
Pure coconut oil
Cashew nuts (unflavoured from LIDL)
Lidnt 90% cocao dark chocolate (for bulletproof chocolate & also half a square curbs sugar craves)

ncprice1, I want to come to your house for dinner. I love soul food.