Well I can tell you what I did but that was based on my specific health needs and tastes so it might not help. My bloods showed I had super low folate and B12, and really high cholesterol so I had to eat low saturated fat, and lots and lots of green veggies. So I researched mediterranean and clean diet and kind of made up my own diet for me. It worked in 3 months - bloods normal and Im back to a BMI of 21.
So I buy chicken thighs, fish pieces (hake, placie, cod, salmon), steak, mushrooms, peas, spring greens, carrots, courgette, aubergine, spinach, cherry toms, sweetcorn, heaps of sweet pots, red lentil pasta, lasagne sheets. Benecol butter, skimmed milk.
I buy reduced fat shredded cheese, low fat feta, low fat mozerrella, 0% greek yoghurt, reduced fat creme fraiche, stock, flour. And heaps and heaps of spices and sauces. I go through sooo much mustard, and garlic now its crazy.
Out of this I make;
Chicken and mush pies
Steak and mushroom pies
Chicken pot pies (loads of green veg)
steak pot pies
fish pies
feta and veggie pasta bakes.
Veggie lasagnes.
The pies have a mix of sweet potato topping, or homemade pastry. I dont buy normal pots.
I do a 70/30 ratio for veg/meat.
The other bonus is my food bill has massively reduced.
Honestly Im a super shit cook, but I find these very easy to make.