For me, it's using fresh and preserved produce but not highly or ultra processed foods.
So starting a bolognaise with an onion, garlic, tinned tomatoes, dried herbs if I don't have fresh, etc.
Not throwing a jar of ready made sauce onto the meat.
I will use pre-made mixes of spices and herbs to get the right ingredients and proportions, as well as having a well stocked basic herbs, spices and condiments collection.
I will cook from scratch frequently but often batch cook those items to freeze portions for other nights I am short on time. I also call "throw garlic, lemon zest and juice and olive oil into a bag with chicken" before freezing cooking from scratch, as i will roast that chicken another night o am short on time without resorting to a jar full of preservatives or extra sauces for flavour.
I occasionally cook chickpeas or kidney beans or lentils from dried, but am more likely to open a tin of ready cooked - but I get low salt and no additional preservative types when buying the tins. I use olive oil, ghee and real butter most often as my fats - never margarine for anything.
For me, it's about using the freshest and cleanest (organic, free range, pesticide free etc) ingredients I can, and getting a broad range of different food.
I eat very little bread nowadays, and most of that is sourdough or brown soda bread.
Sometimes cooking from scratch is a huge amount of peeling, chopping, mixing, stirring in different bits, etc - but sometimes it's as simple as throw some seasoned meat and veg into the oven either with some potatoes (probably also in oven) or pasta/rice, abandoning until cooked.