Here's a holiday appetizer favorite from Renfro Foods (http://www.renfrofoods.com/default.aspx) that is simple, quick and delicious. Best part - It's only 3 ingredients!
Spread half of cheese on 11x9 or 11x7 baking dish. Combine eggs and salsa and spread on cheese. Put remaining cheese on top. Bake at 350 degrees for approximately 30 minutes. Cool 10 minutes. Cut in 1" squares. Serve on tortilla chips.