This one was also a great bang for your buck kind of recipe. It made a ton of food (my crockpot was actually too small to make the whole recipe), and was perfect over spaghetti squash. One of the easiest new recipes I've tried, it is the quintessential easy crock pot recipe.
Pistachio crusted salmon. This one is a totally new way for me to make salmon, but was fantastic and incredibly easy.