OK, here's how I feed my family on a busy evening. It all hinges on planning.

2 pounds of stew beef or cut up pork sirloin (whichever you use just get the cheap cuts of meat.)
1 bottle of BBQ sauce.

Throw it all in the crockpot and set it on low.

When you get home from work cook up some rice or potatoes and some frozen veg and serve the meat. Allow 1/2 hour for cooking the rice and veg and you are golden.

It ain't elegant, it ain't fine, but it fills the spot and lets you get on with your music.