I'm building a food ordering site for a fastfood restaurant. I have all the products imported automatically with the "Feed importers" module.

What I want to do, is to create a product display for meals with customizable side dishes. For example If someone selects fried chicken wings he is prompted in the add to cart form to select side dishes. He selects eg. french fries as a side dish. Then both the chicken wings and the french fries get added to the cart. (Both exist as a separate product in the backend)

I have tried to implement this with the Commerce Custom Line Items module, with no luck so far.

What would you suggest?