Cilantro Pesto

We harvested our first bunch of cilantro this week.
Gabe's dad and Joanne have raved about how wonderful cilantro pesto is, so we decided to give it a try this week. We decided to try this recipe. It looked simple, perfect for dinner on Wednesday night in the midst of a crazy week. I have to admit that I had high expectations and was therefore very disappointed. Levi was very disappointed as well. You would have thought the sauce was actually poison.
Here's what might have gone wrong:
*may not have had quite enough cilantro. And since talking to Gabe's dad, next time I'll add in some basil as well.
*too much garlic. Three raw cloves is overkill. Especially for a 22 month old, even though he does usually like garlic.
*in my opinion, way too much sesame oil. That's all I could taste. Although Gabe said he really liked it, next time I'm only putting in half the amount.

Any other suggestions from those who have made cilantro pesto?