On average, fresh meat contains 65 mg of phosphorus per ounce. A balanced protein-restricted home-cooked recipe for a cat might contain 3 ounces of beef. Please see here:
ground beef, 10% fat, cooked, 3 ounces
rice, white, long-grain, cooked. 3/4 cup
canola oil, 4 tsp
salt substitute (potassium chloride), 1/4 tsp
salt, iodized (sodium chloride), 1/8 tsp
bone meal powder, 1/4 tsp
baking soda substitute (calcium carbonate), 1/8 tsp
multivitamin & mineral tablet, kids complete, 1/2 each
vitamin K, 100 mcg vitamin K per tablet, 1 tablet
taurine powder, 1000mg per 1/4 tsp, 1/4 tsp
This provides 517 kcal - the daily requirement of a 20 lb cat.
Please respond with further questions or concerns if you wish.