have the white rice 2 to 3 times a week for using up. love not wasting. and you can keep it if you like and have forever like 1 to 2 times a week. but definitly get some brown rice now...it will be very good for you!
miso no veggie broth. just what is there in recipie.
for quickie yes for sure cut back on veg...it can be as simple as paste in hot water. or add chives. or scallions and tofu. whatever makes it work for you. and on slower days make with more veg. like 3-4 veg is ideal.
try not to make in advance. although i do that when crucnhed for time..but much better for health to have fresh. that goes for all veg. but sure making it and keeping for few days is fine if thats what makes it work for you.
Made some miso this morning with 2 kinds (mellow white and barley), mushrooms, wakame, and a green onion. I also added a splash of shoyu. It is delicious. I put it in a thermous and I'm enjoying it at my desk now!