Get a pressure cooker, make stews fast and pack them into serving sizes for lunches at work/school or leave it in a large contain and serve it for dinners for days.

I prep my vegetables like carrots, celery and mushrooms and then freeze them. When I want to make a stew I take the pressure cooker pot to the freezer and fill it with the veg I want and get protein I want then add stock and seal the cooker and set it for 28 mins on high pressure and I get a stew that would take a few hours on the stovetop.