I like spice and taking a plain hamburger up a notch is always a fun treat. This idea came from a friend a few years ago and I revisited it. I used a salsa that I got from a friend and it had a medium heat level.
1# ground beef (I used an extra lean but any will work)
3 tbsp medium or hot salsa
pinch of oregano
1 tsp chili powder
Mix all the ingredients together well. Shape into patties. Cook to your desired doneness and melt cheddar cheese on top. Serve on a toasted bun with lettuce, tomatoes, onions, hot peppers and/or taco sauce. Whichever you prefer.