I have been cooking out of One Pan, Two Plates (vegetarian, but includes dairy and eggs. Meat could be added pretty easily, as my husband likes to do)
Most of the recipes use inexpensive vegetable/canned ingredients and pantry staples like eggs and rice. The recipes are big enough for me to get three or four 400-500 calorie servings. I'll cook one night and eat dinner, then have lunch and dinner the next day or lunch for the next few days. All the recipes come together in about half an hour so even if I have to cook it isn't a tortuous hours-long event. The back of the book lists the recipes seasonally, so you know which dishes will likely be cheapest to cook.
I do the ADHD thing where I buy a ton of healthy-ish groceries and then put them away and forget that I have them until they go bad. With this cookbook, I just buy what I need to make two or three meals and none of it goes to waste. Plus every recipe I've tried so far 100% slaps! I've made the potato frittata al'Indienne weekly for months now and I'll never get tired of it