I love the frittata recipes (like this Shiitake Dill Frittata) in Vegan Brunch, especially because they give ideas for frittata "bases" that you can improvise off of.
My cast-iron skillet is my best buddy in the kitchen, especially at brunch time. The ability to go from the stove top to the oven to the table is one of my favorite things about cast iron in general. I think that after my knife and chopping board, the cast-iron skillet gets the most use out of anything in the kitchen.
What about you? What's your favorite kitchen ware? What do you use for any and every recipe you can?