Help with Slow Cooker

i cook things from frozen and its been fine although you are not ment to.
not sure if this helps but i usually put in my corned beef the night before frozen, and leave it on low and then early afternoon turn it up to high if i think it needs it. sorry cant help witht he veges.

just a lil bit. maybe 1/2 cup. it creates lost of moisture while cooking. i learnt this the hard way lol.

I thaw my meat overnight before putting it in, and I usually put veges in with it - root veges though, like carrot/potato/kumara, and they get delicious and soft. Usually onions too for flavour - you could put apple in and that would be nice. I've never tried pumpkin but I reckon it would be fine.

I wouldn't put anything like broccoli or peas in it though, but I guess if you're at home you could add them in the last little bit if you don't wanna cook them in the microwave or in a pot.

I put mine on low before I go to work at 7.30pm, and turn it off when I come home at 6pm - thats probably too long, it would be done definately before 4pm. But in saying that, it doesn't go too yuck being in there for longer and it means I have a yummy dinner all ready and smelling divine when i walk in the door!

Having used my slow cooker for years my tip is to not put any liquid in at all with your silverside.  It produces a huge amount of liquid on its own and will cook in its own juices.  I peel whole potatoes and put them in and normally put it on low about 7am and it goes until 6pm when we get home,  last night we had a steak & kidney casserole which i cooked overnight and turned off in the morning.  that way we just heated for 2 mins in micorwave when we got home, 

soup is another goodie to in the crock pot. and chicken,  if you have one of those stands, put your chicken in on low and leave, when you get home  a few minutes under the grill to crisp the skin and you are away,  makes the meat extremely tender, great for those adjusting to new foods. easy to swallow and chew.