I love this side dish with just about anything. The only bad part is that it heats up the house, so you may want to eat outside after you make them.
6-10 potatoes (red, white, or Yukon gold), cut into 1/2"-1" cubes
1/4 c. butter, melted (you can use olive oil instead)
1 T. lemon juice
2-ish sprigs of rosemary
Preheat oven to 450 degrees. Line a large cookie sheet with foil. Melt butter in a mixing bowl (in the microwave). Add lemon juice, rosemary, salt, and pepper to the melted butter. Toss cubed potatoes in the butter/lemon juice. Remove the potatoes from the mixing bowl (I use tongs) and spread them on the lined cookie sheet in one layer. When you've filled up the cookie sheet, place in the oven for 30 minutes. The potatoes should be a little browned when you take them out. (Don't let them sit for too long before serving because they'll get soggy. Still good, but soggy.)