Only cook things in the slow cooker that you would cook for a long time anyway so baked potatoes, dhal etc.
A tray bake, I use chicken but leave that out.
Put a bit of oil in a bowl with salt, pepper, paprika, and what ever spices you like, add par boiled new potatoes (or don't boil but you need to start them 10 mins earlier) sliced peppers, sliced onion, other veg of choice. Leave overnight, when you are ready pour it all onto a baking tray, add cherry tomatoes and put in the oven for 20 mins - I use it to fill tortillas but you could put in another bread or just eat as is.
Good old fashioned beans on toast is quick, as is anything else on toast eg cheese if you eat it.
Rice cooked in 50/50 water and orange juice makes a nice base, I add smoked fish but something else smokey would work, maybe chick peas with some smoked paprika.
Rice, cocoanut milk, water and cashew nuts with a little water works well, I use a rice cooker, it cooks then keeps warm so you can cook it early or prep something else to go with it.
Don't be scared of tins and cans, you have 2 small children you don't have time to organically grow and harvest fresh produce.
A packet of mixed frozen veg and a tin of curry sauce makes a vegi curry, or you could use another sauce or a tin of Campbells condensed soup - the mushroom has some milk in.
Actually looks in condensed soup and crème fraiche with some peas and sweetcorn makes a good meal and you can also use it to make a pie.