I've spent a little time in the kitchens at delicious restaurants.
you have to be smart, and i'm no expert. That's my disclaimer done.
Sometimes, though, the secret is fat and sugar. Or if your recipe is already good, consider how much more "Restaurant" or "fast food" it might be with more oil, more sugar, more salt.
I make a steak with just BBQ sauce, garlic powder, and italian herbs. Everyone loves it. Secret is like half a bottle of cheap BBQ sauce and lots of hot oil in the pan. Heat helps. I did this with homemade onion rings (battered) and homemade battered mushrooms. Was a hit each time.
I'm not saying it's always a good idea to add these things liberally. But I am saying it's no use cooking with next to no oil, sugar, salt, fat, all week followed by eating pizza, ribs, chips, onion rings on the weekend and thinking nothing of it.
You can make unhealthy food "healthier" by making it less of a departure from moderation and incorporating it into your plans.
While i'm mid rant I just wanted to say. In some ways Mustachianism is the advocation of moderation and control and being deliberate instead of being "carried away" by the shiney salesed-up product/notion which is seldom as good in reality as you build it up to be. Moderation in all things is a good motto.