So, some points for consideration….

Canned vegetables will have around half their product weight in Canning Liquid. So keep that in mind when comparing prices on frozen ($0.082/ozverse canned ($.044/oz).

Frozen is also usually better in quality (texture, nutrient value) and lower in salt and other preservatives. Modern freezing centers are frequently able to get nearly as good as fresh; and might come out on top if you’re not buying from the farmers market.

Lentils and rice represent a whole protein, and are easily adapted to a variety of flavors; (For example); takes about 10 minutes of prep, 25-30 of reasonably hands off time and can be easily made in advance and augmented with fruits and vegetables. (For example, sautéed squash/zucchini plopped on top.) or basically any kind of stir fry mix.

Block cheeses are going to save you money, compared to sliced or shredded.

On that note, Alfredo (or rather pasta al burro) is super simple to make; albeit requiring some technique and experience : reserve some (hot) pasta water, in a large bowl, soft butter and the drained pasta. Stir until coated toss in the parmigano regianno; use the pasta water to help emulsify and melt the cheese. (Alfredo melts 3x butter with heavy cream, reduces that then adds the pasta and cheese, a bit more work, imo.)

You’re probably thinking I’m a snob for using the Italian name for Parmesan. Fun fact: in the US Parmesan is not in fact Parmigiano reggiano as it is in the EU- but if you stick to block cheese and away from that Kraft shaker Parmesan, you’ll be fine. (It’s cheese, mostly, but there’s stuff added to it that makes it… not good… for sauces.)

Also, in a similar vien, a mornay sauce can replace Mac and cheese tubs, and generally don’t require extra time compared to just cooking the pasta. (Equal parts melted butter and flour, whisk together until smooth, medium-low heat. Whisk in milk slowly until the consistency of heavy cream, then whisk in shredded or cubed cheese a bit at a time, letting it melt. When the pasta is mostly cooked, reserve some of the water and drain the rest, finish the pasta in the sauce, using the pasta water to control consistency and as an emulsifier.)(if you want to get fancy, before making the roux, sauté a minced clove of garlic and maybe some minced onion in the butter, then proceed. Black pepper to taste.)

Oh, and pro tip, heads of garlic cost less than the jars of minced grossness. Similarly, saving scraps like onions, carrots, celery, ginger, mushrooms, and stuff, can then be simmered in a lot of water to make stock, and can add flavor and nutrients to things like rice or stews (potatoes, mushrooms?)