Love quiche. We went through a quiche phase one summer, and I was constantly taking whatever fresh veggies were available in our garden and baking up quiches. Good, all purpose food for breakfast, lunch, or dinner. And the kids even like it.
Right after the birth of our daughter some friends made us meals for a while and one created this cashew, ginger, and winter squash quiche that was amazing. When we talk about it she laughs because it was something she just made up on the spot and has no recipe. She's a little embarrassed that she tried a completely random new food on us, but she is such an awesome cook I'd eat whatever she made.
On the more ordinary side, bacon and fresh spinach are always a good option. Sausage, green pepper and onion is another favorite. Works really well for having people over for brunch because you throw it in to bake, and then you're done, unlike a lot of other breakfast foods that you have to time or keep producing (which means time in the kitchen instead of with guests).
We had some friends over just after the new year and the menu was quiche and scones and a long Saturday morning conversation.