paleospirit.com. It's an awesome paleo site chock full of good stuff for body mind and spirit.
Basically for these egg muffins it's cooked crumbled sausage, scrambled eggs (I use eggs from a local farm) some fresh herbs (you choose) and split grape tomatoes. Cook at 350 F for 20 mins or so, then cool.
Make sure you oil the muffin tin first. I didn't and they didn't stick too much but a little coconut oil or ghee would add to the flavor.