I Put My Kitty On A Diet And I Need Advice!

After getting my Mazie girl fixed and all good with her shots, I wanted to get her on a better food plan. So, instead of feeding her throughout the day I want to be able to get her food in the morning and she just eat periodically. She is fully indoor and I feel this would work best for her diet. We just made it through the first week and she is still eating all her food in the morning and at the end of the day she cries because she wants more food. If you have any advice I would love some suggestions!