Add in a couple of 'dollar meals' each week or even more often... depending on how much you want to save and for how long in balance with health.
Dollar meals for me, come in at about $5 for the meal. For the whole family.
A couple of examples: Tomato Pasta Bake: 2/3 bag of pasta 66c, cooked plus a jar of stir through tomato pasta sauce $1.60, 2/3c shredded cheese on top 80c. Additions to this can be a drained can of tuna in spring water and/or a cup of frozen corn kernels, or some gently fried onion & mushrooms or stir fried literally 'whatever vegies are leftover in your fridge'. How about a Vegie Fried Rice... a couple of cups of rice, steamed, a few eggs diced after being 'ommeletted' (my word LOL) and then some diced vegies - whatever you have in your fridge which for us seems to be capsicum, mushroom, broccoli, carrots along with some onion and frozen peas/corn/beans. A few splashes of worcestershire sauce or whatever you like to use and you're done!
Spend some time brainstorming low cost meals you can make for your family! Baked beans on toast is about $4 for our family - including 2 large cans of baked beans... and if your family won't eat what you feed them, then you've bigger issues on your hands than dollar saving!