It depends what you want to cook really.
Meat can be expensive, but I've found the quality so much better then here in OK so worth it. I don't buy loads to stock the fridge though, I've learned from experience that I intend to cook but don't so buy as I need it. Fruit, veg, chicken, yoghurt and eggs from the market are all cheap enough too.
The more we visit the less time we spend searching out somewhere for an evening meal and often grab a couple of chicken wraps, have a pizza or something from the local lokanta delivered and just chill on our terrace with a bottle or two of wine. Just as cheap as eating in and no cooking