Home Cooking is the BEST! I have yet to do that for them everyday, but hope to someday. I'm just so scared of not giving them a balanced meal w/the appropriate supplement. You can use any suplement that your vet suggests or Balance It, many YT'ers use it. It's very important that their home cooked meals are supplemented bc it's lacking in vital nutrients. For example, dogs & cats need taurine, it is an essential amino acid.
Taurine Deficiency in Dogs | petMD
Some veggie proteins need to be paired w/a certain food to get the proper amino acids from those foods. So just tossing this & that together is not the best thing for your pet when home cooking, that's why it's best to get a recipe from a vet nutritionist. You can generate free recipes from Pet Diets that ladyjane linked.