I present to you: The Pantry. All my secrets are now revealed. LOL. Here's what I'm starting out the year with. Obviously, I have a supply of staples (bought on sale, of course), plus a bunch of other odds and ends that I've picked up here and there. There is no other food in the house.
I don't have a chest freezer (I wish I did). I don't have a giant pantry room; it's 2'x2' next to the fridge, plus the stack of buckets along the wall.
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2 boxes cake mix
1lb. raw almonds
3 packages of gluten-free "Oreos"
1.5 bags of marshmallows
3/4 box of lasagna noodles
1 box rice crispies
1 bag potato chips
13oz bag of flavoured rice
6 shakers of sanding/decorating sugar (2oz each)

14.5lb dry pasta
8oz pack of rice noodles
2lb gluten free dry pasta
1/2lb dry chickpeas

3lb popcorn
~8lb baking soda
4 cans garbanzo beans
2 cans kidney beans
2 cans black beans
14 cans corn

~17lbs peanut butter
3lb strawberry jam
4 cans olives
2 cans tuna
20 cans tomato sauce (8oz cans)
16oz jar peperoncini

5lb honey
2 tubs frosting
~4lb chocolate chips
54oz salsa
~1/2 cup coconut oil
2 big squeeze bottles mustard (60oz total)
16oz plain gelatin
20lb potatoes
2lb pistachios

8oz jellybeans
2oz Sour Patch Kids (candy)
~5oz Smarties (candy)
96oz canola oil
2.5 bags white chocolate chips
~8oz peanut butter chips
16oz xanthan gum
4oz pretzel salt
1oz alfalfa seeds
2oz dried dandelion root
12oz psyllium seed husk powder
12oz macadamia nuts
10 individual packets of salad croutons
Assorted parmesan/red pepper/sugar packets
1 single box of raisins

4oz cornstarch
4oz vanilla extract
~6oz cream of tartar
8oz xanthan gum
12oz baking soda
1tbsp nutmeg
~6oz liquid lecithin
1/4 cup baking cocoa

8oz smoked paprika
4oz black pepper
24oz sea salt
~9oz garlic granules
11oz cinnamon
14oz cumin
2oz ginger
16oz turmeric
2.5oz italian seasoning
15oz coriander
14oz allspice
17oz cayenne
8oz chili powder
11oz mustard
4oz dill

5.75lb white all-purpose flour
10.5lb brown rice
~9lb white sugar
~16oz canola oil
~1.5lb dried lentils
~10.5lb gluten-free flour mix (giant christmas tin is GF flour)

1 pint raspberry sorbet
19 gluten-free chocolate chip cookies
5lb ground beef
2.5lb breakfast sausage links
4lb bratwurst links
3.5lb pulled pork
2.5lb batch of lentil stew
1lb pecans
8oz cheese tortellini
3lb frozen peas
10oz pepperoni

1 pack giant tortillas
2lb butter
3 packages of sliced cheese (6oz each)
1.25lb dried mission figs
14oz dried pears
1lb sliced ham

4lb mozzarella
1lb cheddar
1lb sliced roast beef

3 sticks butter
1 knob of ginger root
20oz parmesan cheese
~32oz mayonnaise
~16oz mustard
20oz ranch
~20oz homemade (dairy-free) ranch
4oz lemon juice
8oz nutritional yeast flakes
14 string cheese sticks
20oz chocolate syrup
~36oz salsa
~2oz BBQ sauce
~20oz ketchup
~22oz sriracha
6oz beef bouillon base
~3lb minced garlic
10oz worcestershire sauce
10oz tahini
~24oz balsamic vinegar
10oz soy sauce
Ziploc of assorted condiment packets

1lb walnuts
8 eggs
5 bottles Powerade
~28oz yeast
4oz strawberry jam
8 corn tortillas
1 batch of sugar cookie dough
A couple fridge experiments...lol

1/2 gallon whole milk
12oz almond milk
1 bottle water
~24oz molasses
1 pint rendered pork fat (in two separate jars)
~1 cup sunflower seeds
1/4 loaf bread
~20oz apple cider vinegar

2 cucumbers
3 beets
1/4 bunch of celery
7 roma tomatoes

16oz breakfast sausage links
2 heads broccoli
~40oz pancake syrup
1 pack flour tortillas
3oz cheddar cheese
~4 whole dill pickles

11 onions (~8oz each, on average)

2.75lb carrots

4 avocados
~2lb honey
[not pictured: 9lb navel oranges]

~50lb whole wheat flour (2 buckets)
~50lb of quick rolled oats (3 buckets)
~10lb brown sugar (1/3 bucket)
~25lb dried pinto beans (1 bucket)
11lbs dried lentils (1/3 bucket)
~2.5lbs popcorn (1/10 bucket...now in a jar, lol)
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This is what I have on hand, as of December 29. There will be a few things that get used from the fridge before Jan 1, and I think I'm going to make one last errand to King Soopers tomorrow. [I'll edit later to include the few items-- planning to get pineapple, some chips that are a saturday-only sale, collect all my free-friday items, see if they have anything good in markdown.]
||[EDIT to add purchases made 12/30]||

1 head iceberg lettuce
2 whole pineapples
16oz lime juice
2 fruit cups (freebie)
1 package flavoured rice (freebie)
1 package instant pasta (freebie)
4 bags potato chips
4 dozen eggs ($.88/dozen! How could I resist?)
[not pictured, because derp: 1 gallon Mazola canola oil]
As a note: this is not I'm-gonna-write-a-series-on-how-to-eat-cheap-so-stock-up-extra-beforehand-so-I-can-make-it-through. This is all stuff I buy along the way, as we need it, and ~99% of it was purchased in 2017, in which I averaged ~$180/month on food.
The most important of all these, I'd say, are the staples-- oatmeal, pasta, potatoes, rice, beans, lentils, gluten-free flour, and meat. Those are hard to do without, and expensive to pick up when they're not on sale.