Anyone else just trying to get a bit fatter?

If I was in your situation, I would probably just choose the food I liked the best and start eating a lot more of it!

With a BMI of 15 your first priority should be to gain weight. There is no need right now to force yourself to eat foods you hate or make you feel sick just because someone else recommends them.

Once you get better at increasing your intake, you can worry about hitting reasonable macro targets and developing a better workout routine.

Me! I've been trying to maintain for the last month, using the calories MFP told me to eat, and have lost an additional 3 pounds. I'm thinner than I like now and am trying to adjust my thinking to be able to eat enough to gain a couple of those pounds back, as the loss of body fat is making my hormones do some weird things. I think I am going to be having fun eating pie and cheesecake and delicious full-fat Greek yogurt. Also, protein/fruit shakes made with full-fat milk and Greek yogurt are delicious. I think they make me less full if I don't add protein powder, however.

I would like to gain muscle too, but in summer most of my activity is gardening, and I don't want to be indoors doing weights when gardening is kind of a strength-enhacing activity already. Plus, like you, I would rather gain a little body fat first.