Pea milk has a similar amount of protein to soya and dairy. It doesn’t have the beany flavour of soya (it’s the closest to dairy in terms of flavour IMHO) and works well in hot drinks.
I have no idea if it’s safe for cats though; it’s typically made from yellow split peas.
Almost once a week from an online supermarket. I typically plan 4 or 5 meals as I shop, with adhoc rice/pasta/noodle dishes, frozen portions and takeaways/meals out that usually lasts for 8 or 9 days.
I mostly cook vegetarian so most of the shop is fresh vegetables. We do eat chicken or fish once a week though. “Essentials” are pea milk, fruit juice, tomatoes, bread, eggs, avocados, oats, fresh/dried/frozen fruits - everything else is meal dependent.
It’s much easier planning and buying from home and the selection online is much better than any of the local supermarkets. The only thing I regularly buy offline is coffee from a local roastery. There’s some great independent shops in my village, but the green grocer can be a bit hit and miss on quality and it’s rare that I can find everything we would like (or need) so I mostly use for the odd thing/special occasions. I will go to the bakery on a weekend in warmer months though.