My oldest girl is 7, she turns 8 in May. Then I have a 5yr old boy and 3 yr old girl. They're a ton of fun. I miss babies though
My family doesn't go bland either so I've just gotten used to making my dinner at the same time I make theirs. I try mostly to stick close to what they're eating but just extremely modified. We eat at the same time regardless and they've gotten used to my "health food".
What I did starting off was make a complex carb/protein/fat/ list of foods I designated as "OK". It was comprehensive and I put it on my frige. I then only had to look there to create my meals. I always always wrote down what i was going to eat the next day, the night before (or did fitday to see ratios). It prevented me from doing something "wrong" and I followed it no matter what. If I wasn't hungry-tough. If I didn't "feel like it" tough. I just did it. It was like my job for a while and sometimes I wasn't always comfortable with all the food. My grocery list was pretty much the same (for me) week after week with slight variations and I made sure I never ran out of stuff.
Whey powder saved my life. It gets protein and cals in without the bulk.
I was anal about "clean eating" because if I was going to possibly gain weight, I wanted it to be going on as muscle and I knew eating clean would prevent weight gain to more of an extent, than not. Now I just love the way eating that way makes me feel so I stay with it as much as possible.
I did cheat days once each week for a little while. It helped me jump my metabolism to the next level and get rid of my fear of "eating normal". Now cheats are during events I can't control as well, like birthdays or holidays.
SO thats a long answer to just say to start, I would make a written list of "acceptable foods" and then keep a notebook of written menus and activity per day along with weight on days you weigh. I filled up 2 notebooks during the whole thing

Its great cause then you can look back and see what things worked, or didn't. After that make sure you have all the things you need in the house to be successful. Always eat breakfast and then time your meals about every 3 hours apart after that. My model was:
b-protein/complex carb or simple carb
s-protein/complex or simple carb
l-protein/fiberous veggie/fat
s-protein/veggie or dairy
d-protein/veggie/fat
I just rambled a whole bunch but I hope something in there was helpful to you!