I think you're underestimating the power of your freezer...
Cottage pie is a classic freezer food surely?
Toad in the hole is trickier, but people on here often say they freeze yorkshire puddings so doing t separately could work?
I assume there ARE ways to freeze rice because I buy a lovely frozen risotto from waitrose sometimes! 
so perhaps research that?
For other things, can you justify the added expense of rice pouches? They're so handy if you've got something that can just be heated up without having to wait for the rice to cook? I love love brown rice but hate the schlepp of cooking it so buy pouches for that and white rice for other days.
Lasagna freezes brilliantly. It's also a hassle to make so I always make enough to freeze. Both meat and veggie versions.
Bolognaise sauce - then just cook spaghetti to go with it.
Cauliflower cheese can be frozen. The cauliflower does come out slightly mushier than it would normally, but we don't think it's enough of an issue for everyday. We use a mix of broccoli and cauliflower which works well as the broccoli freezes better.
Tomato-based pasta sauces freeze well and can be heated up while you cook the pasta.
We used to regularly do "red pesto" - roasted veg and tomatoes with some olive oil. Once cooked, use a hand blender to blitz it all up, usually adding some cream cheese or quark and sometimes some walnuts. Stick in freezer in relevant portion sizes and serve with spaghetti/penne instead of green pesto!