I need help and recommendations

So my husband and I want to try to start doing meal prep. I had a baby 7 months ago and I’m starting to feel very self conscious about my stomach and how much I’ve let my body go. My husband on the other hand wants to gain healthy weight. I wanted to make a list of how many portions and I should be eating and what kinds of foods are good to loose and as well gain healthy weight. I wanted something set for breakfast lunch dinner and a snack. I’m cutting out chips and soda fast food everything trying to go cold turkey. So is my husband what do you ladies suggest and thank you in advance. Also we are going to work out as well.