Expression used here and there by Everyone
v. • To cook a dish slowly and with a lot of love. It conveys the idea that you care about what you are cooking and the people who will eat it.
"Je vais vous mitonner un petit plat, vous m'en direz des nouvelles."
"I'm going to make a meal for you and I bet you'll like it."
12 out of 18 French speakers have heard this