Firstly I think that the trend for very high fat diets has skewed the Paleo perception of what constitutes a low-fat meal. With about 300 calories per serving coming from fat, or ~50% of total calories, I would not personally classify the meal as low-fat, though there is certainly enough to facilitate the absorption of the fat-soluble nutrients present in the squash and spinach.

Equally, whilst the recipe lacks animal protein, only 0.8g/kg is necessary, meaning about 28g/day for a child, which is easily obtained via other meals/snacks. In fact, excessive and unbalanced methionine consumption is actually detrimental.

Although there are minor issues that we at Paleo Hacks might focus on eg olive oil is slightly too omega 6 heavy and is suboptimal for cooking, really my one major concern would be the gluten, which I don't think anyone should be eating on a regular basis, regardless of coeliac status.

I looked through the dinner posts, and I think this family eats better than a good 80% of Americans at least.

However, I think it's far from optimal for a developing child and would not feed my own kids this way. I believe strongly that no gluten, few grains, moderate starch and animal protein, high in quality animal fats and green veggies, is the way to go.

Replace all the bread with more harmless/whole-food starches, and it's very similar to the traditional diets of healthy tribes all over the world. The main effect of a high-starch, low protein diet seems to be simply less muscle mass/higher subcutaneous fat, leading to a lower BMI and 'soft' appearance (also probably less strength and ability to get stronger). There's no evidence I've seen that health or longevity is negatively effected by such diets, as long as micronutrient needs are being met.

Eating moderate to high protein for vanity and strength gains is justified in my book. :)