OP,
I remember the afterwork crunch time as well. If it's not something quick like scrambled eggs or quesadillas, I would try to make more time consuming meals the night before, e.g., baked chicken, mashed potatoes. You can always heat these up and steam green beans that evening.
You may also want to look into getting a crock pot. You definitely need to be organized in the morning to throw it together, but whatever works for your schedule. Definitely plan out your meals and grocery shop at the start of the week. Time management helps.
Often toddlers are little grazers, so you can always present a tray of healthy choices cut in toddler friendly sizes, like cut fruit, crackers and hummus, cheese cubes, etc. Eating what you eat can pose a choking hazard for young kids depending on what it is:
http://www.webmd.com/parenting/baby/news/20041011/kids-choking-hazards-may-go-unnoticed
Lastly, a friend of mine who didn't know how to cook was completely overwhelmed when she had a kid in terms of dinner. If you don't have basic skills, take a class or get a very basic cookbook. Practice 2-3 entrees until you feel very confident with them.