When the family restaurant is going under, a klutzy teenager accidentally creates a secret menu based on her cooking mishaps, and must keep up with the charade to help save the restaurant.

I think there’s something in this idea. Kinda Ratatouille-esque.

Couple of pointers:

The protagonist shouldn’t do anything accidentally in order to achieve the goal. A PROtagonist should be PROactive.

How do you create a secret menu anyway? Do the customers get this menu privately and then she cooks them the food without her family knowing? Is this the charade that she’s trying to keep up?

I would remove “accidentally”, explain specifically what she is doing regarding the menu and the food – simpler the better, tell us why what she’s doing is going to help (she creates unusual combos the crowds go wild for?) and somehow explain why she has to do all of this without her family knowing. It sounds a lot but I think once you unpack the story I think it’ll fall into place.

Try the generator too… it might be a useful tool.

Hope this helps.