We finally tested our kitchen sink cooking and it worked great. The recipe was the McCormick beef stew seasoning mix, meat and veggies (doubled). The method was to prep meat and veggies and put in fridge overnight. Set crock on counter for quick access and set out whole potatoes (cut at last minute to avoid discoloration), knife, cutting board and seasoning packet.
In the morning- Cut the potatoes, lay the silicone dish drying mat in the bottom of the sink, set the crock on it, dump meat, potatoes and veggies in it, mix the spices with water and pour that in then put the lid on. I laid a silicone hot pad between the cord and the edge of the pot to protect the cord from the heat. Plug into the kitchen outlet and turn on the inverter.
Dinner cooks while you drive. Even though the crock was over filled, we had no spillage.
One negative is that you smell that stew cooking all day while you drive. While it smelled heavenly, it was killer on the hunger pains. The McCormick seasoning was very good and we added a loaf of crusty bread to round out the meal. Leftovers went into the freezer for a quick meal another day.