so you're planning on having three things for dinner every night? one for the hubby, one for the kids and one for you? that seems like a waste of time and money.
if your kids really are eating pretty healthily, then you should be eating the same thing as they are, perhaps just getting lowfat dairy for you where they use whole.
as far as the spark menus go, they're randomly generated by a computer, which means that they don't take into account the season or using up what you have, which are two keys to keeping your grocery bill down. since you do have a family, you could plan meals around using up what you have, but you'll still have to make some tweaks. personally, i keep the menus on for ideas and inspiration, but as a single person, the first thing i would do with the grocery list would be to edit the fruits and veggies down to three or so perishable ones, bump up the volume so that they were taking up most of the servings for the week, and tweak the rest so that it's canned, frozen or dried so i don't have to worry about spoilage. since you have a family and if you bought a head of broccoli for a meal, you could easily use it for many other things without being sick of it or having to make sure that you freeze it for later use or cooked it into something to use as a heat and eat meal later.
the other part of that is seasonality. so when you're cutting down the list so you aren't buying twelve different kinds of produce, make sure you're doing it with your local sale flier and replacing berries with apples or citrus in the winter or winter squash with summer squash in the summer. those sorts of swaps are what keeps the grocery bill down.
your best bet is going to be tweaking what your kids are eating and making that in bulk for everyone. you'll be able to buy in larger quantities [which helps keep the cost down] and you'll only have to make one meal. you can certainly use them for ideas, but feel free to swap things that are on sale in for things that aren't.
and i will say this. i am a grazer. i have always been a grazer and i'm always going to be a grazer. so instead of eating full meals [which i don't find satisfying and i'm hungry an hour later anyways], i snack all day long. i eat about 200 cals about eight times a day. i try and eat something along the lines of balanced snacks or mini meals, so it's not like my snacks are fruit snacks or hohos. i might have 200 cals of veggie curry. i might have a scrambled egg with veggies on a half bagel. i might have granola and yogurt. i might have stir fry for first dinner and lasagna for second dinner.
the key to eating more often is to make sure you're eating fewer calories at a go. and making sure that you're getting fat, protein, carbs and fiber each time you eat.
think of it this way, you can finish a family sized bag of chips in one sitting if you aren't paying attention and munching. but if you have them with a guacamole or a greek yogurt based dip, it slows you down a little. well how about if you paired your chips with a hearty veggie chili and a little cheese and some guac and salsa? odds are you couldn't eat the whole bag. so if you find yourself mindlessly munching, focus on finding something that you can snack on that might fill you up. for me, i could eat 400 cals of pringles and still be hungry, but have 100 cals of shrimp stir fry and feel full. it is about realizing when you are doing that and changing what you're doing. you could do it by breaking the habit [not snacking] or you could do it by changing the habit [grabbing something different to snack on].
-google first. ask questions later.