Slow cooker is also a godsend and I never brown meat. It's not gourmet but tasty. Preschool veg in the evening, stick in large plastic freezer bag in the fridge. Throw in cooker in the morning, add meat and bit of "sauce" stuff and voila! Ones I use if the evening is v busy.....
Casserole beef chunks, bag of veg with chopped onion, carrot, leek. Add large potato chunks in morning so no carbs to cook. Throw over mixture of tomato purée, balsamic vinegar, beef stock. Not too much liquid or too runny.
Pork chunks (shoulder, pre chopped by sainsburys), bag of veg - green, yello, red peppers, onion, carrot. Sauce of tomato purée and large slug of white wine. Mushrooms yummy too. Makes gorgeous casserole.
Beef chunks, onion, loads of red pepper chopped, sauce of beef stock, worcs sauce, paprika, mustard. Yummy goulash.
Sausage stew - brown sausages night before - ie stick in oven on tray for 40 mins, no great effort. Chopped veg bag with garlic, pepper, onion, carrot, celery maybe, leek - whatever's in! Then add potatoes in morning and red lentils, sauce of red wine and stock, to at purée, and lovely sausage hash.
Just takes fifteen mins chopping and stick your veg bag in fridge night before, get slow cooker set up, then five mins to chuck it all in.
Seriously, when you're groaning with hunger and there's a tasty beef stew making the house smell good at 6pm, you are so glad you bothered!!