I don't think it's loneliness -- I think it's a stark contrast to most of the other major recipe collection sites out there that are visually cluttered.
I think that's a refreshing change for this type of site; You may want to consider a means of allowing users to curate and discuss recipes on sub-domains, some kind of API or some other means of splitting it up? A kind of crisp, clean social platform for food prep ....
I don't seek more flashiness or colors. I actually appreciate the simplicity.
Thoughts on what the feeling could be rooted in:
I Think it would help with more than 3 recipes on the front page. That gives a feeling of emptiness that can be confused with loneliness.
I also think there could be a better choice of image cropping. One that does the trick of making them all one size, but that also lets me see the food and thus inspires me.
A weird piece of feedback: Something about the UI gives me a substantial feeling of loneliness.