When Söpö was still alive I used to budget and was fairly strict with my food bill. Back then it was from 15 to 25 euros per week.
Now-a-days I don't know what my food bill is, but everything included (hygiene items and food), my weekly trip to the store can be from 26 to 40 euros.
I eat potatoes, carrots, tomatoes, spaghetti, macaroni, blackbean patties, tofu, hummus, bread, raisins, walnuts, blueberry powder, roasted ground flaxseed, roasted onion, oatmeal, TVP, beans, chickpeas, cucumber, soymilk and some bananas when I can find some that aren't moldy. And then I use a little bit of ketchup, senap, cookies, chocolate, peanutbutter, canola oil, salt and vegan margarine. And then some condiments, typically unsalted grillmix, onion and garlic powder, cinnamon, basil and oregano. And when I feel ill I drink mint tea or chai latte.