One of my favourite books for cooking everyday food is "cupboard love" by Tom Norrington Davies. Its fairly basic, but the food is nice. I have never made such a professional tasting salad nicoise.
To be honest, I think the best 'short cut' when cooking is to eat something over 2 nights. Mashed potato may take 20 mins to half an hour to prepare but can be spread to three meals - sausage and mash one night, fishcakes another etc.
The 'late bedtime' phase of toddlerhood/childhood is a complete pain though. We ate ALOT of pasta. I actually felt more rested when DD was a newborn than previously because DS suddenly started getting tired at 7pm again.