These recipes are really useful for your sims. I am not exactly sure whether or not they will work on the PC version, but they definatly work on the PS2 version of The Sims 2 and The Sims 2: Pets.
Basically if you want to discover new recipes just put ANYTHING together, its fairly simple!! I spent hours just making my sim eat, and eat, and eat and found some really great one's. These recipes are for creating the little love hearts and stars that flow out of the food. One of the heart recipies (I cant remember which one) actually made my sim propose to another one!
Llama, Rye, Olive Oil, Potatoe
Shark, Sourdough, Banana, Turkey
Lettuce, Soy Milk, Swordfish, Llama
Tofu, Egg, Corn Oil, Tomatoe
Ostrich, Butter, Brocoli, Onion
Corn Oil, Milk, Whole Wheat Flower, Llama
Rye, Eggs, Beef, Yogurt
Banana, Beef, Lemon, Spinach
Tofu, Cheese, Lettuce, Lemon (may cause Nausea to)