DS also 18 months so very good thread! DS doesn't like hunks of meat so still mince things up when I do batches, even spag bol, into ice cube trays.
Pizzas. I freeze batches of tomato coulis in the summer when toms, peppers are tasty and cheap, put into ice cube trays and use it as topping for mini pizzas on muffins (also from freezer) with cheese, ham etc. Also as base for pasta sauce.
No freexing but also do a stiry fry thing with chicken, noodles, veg and teriyaki, I KNOW it's got salt in, but it's not soy, also use sesame oil to fry etc which I think is healthy??
Couscous with roasted veg. Also do freezer batches of roasted veg, whizzed up into ice cube trays and use it to make the stock for the couscous so it's tastier without salt etc, Guess you could freeze the roasted veg themselves. Also use this as base for pastat sauce.
Must admit I buy good quality fishcakes, beef burgers & quiches for freezing too.
Pancakes, not sure about freexing, but think you can.
Potato and veg tortilla, doesn't freeze I don't think, but can do pots etc in advance.
Banges and mash. Err...