I use Walmart's app to get most food delivered to me, it's not perfect but it has a lot of good features like being able to pick out substitutes for things they can find and stuff. That cuts down on a lot of energy put into food. Otherwise I jump around my food prep options, I have a vegetable cutter thing that makes chopping or otherwise cutting vegetables really easy but if I dont want to do any prep at all i buy already cut up vegetables, meats, salad mixes and such. If you get prepreped ingredients you can also use them to add more substance and nutrition to TV dinner or instant ramen type meals so most of the cooking is microwaving things but you still get real meats and veggies and such. Also canned diced or canned petite diced tomatoes are a god send for spicing up basic pasta or rice meals and they go well paired with most other meats and veggies.

I also have my food picked out and delivered to me! I think both Walmart and Amazon accept EBT these days if you use that program. So for lunch and dinner I tend to cook at least two meals in bulk when I have energy and keep leftovers in the fridge to microwave and eat throughout the week. I try to keep breakfast pretty simple like microwave oatmeal with berries or toast or a granola bar or something. I recommend meal planning if you're able, it can save money by only buying what's needed and eliminates the time it might take to try and decide what to cook. I agree with AnimalBoy, using canned stuff, a chopper, frozen berries or veggies (these also tend to be cheaper) can help a ton. I have certain staples on hand like rice (instant rice is an option), lentils, canned beans, I make my own soups but you can buy canned soups, etc. There are certain things I make if I just need calories and I'm out of leftovers with no energy. Like ramen, mac & cheez boxes (I'm vegan and lactose intolerant so no real cheese for me lol) or instant mashed potatoes. Like you've already mentioned, pasta and marinara is another easy option.