One handed meals, is this because you are holding the little one? If so, have you thought about using a sling. They are great for allowing the little one the closeness they need, while still allowing you the freedom of two hands.
Crockpots make for some easy meals. I throw in some pork chops and some cream of mushroom soup. Cook on low for 8-12 hours. Make some instant tatters and use the soup as gravy. yum.
I don't know about anyone else, but the big sling with baby in it is in the way to get anything done. I even have a hard time at the grocery with it, but use it anyways. just try to work around the baby crying and eating.....dinner won't always be the same time....etc, part of having a newborn. I try to collect gift cards for pizza and other cheap dinners when I am in a pinch.
you can fry some hamburger and freeze it while you have someone helping you......just defrost and add to spag. sauce, hamburger helper....taco soup, taco salad on chips with meat, cheese, salsa, and sour cream.
I like crockpot meals. Just add meat, veggies and potatoes....you can also buy some of the "in the box" meals to get you through the first month....they don't taste the best, but they are cheap and easy to make. You could get some breaded chicken breast and eat on bread with can of veggies and mac-n-cheese...