Hmm, https://toffeehazel.itch.io/foods-and-ingredients-32x32-icons this one has leans toward savoury stuff, but i feel like it doesn't have the main dishes that you are looking for. There's potato related dishes, raw and cooked proteins, like chicken, beef and around 3 types of seafood.
Main dishes are going to take a lot of time to make and research.
And yes, giving credit is required and appreciated in a commercial game.
Toffee