White Castle Sliders

I saw this recipe on Favorite Family Recipes and had to try it.  When I was a kid, my dad always made hamburgers with cooked onions and I loved those burgers.  This recipe reminded for some reason reminded me of being a kid.  These burgers were awesome and my kids were begging for more.

1 1/2 pounds hamburger
1 onion, finely chopped
1 package Lipton onion soup mix
1 tablespoon peanut butter
1/2 cup milk
Sara Lee Classic Dinner Rolls (I just used regular hamburger buns)
Cheese slices (I just used shredded colby jack that I had on hand)

In a large bowl mix (with your hands or a spoon) the hamburger, Lipton onion soup mix, peanut butter, and milk. Spread the meat mixture on a cookie sheet with a lip. Use a cup or rolling pin to roll over the meat to smooth it out.  Put it in a 350 degree oven for about 10 minutes. The meat will shrink. Take it out of the oven and put the diced onions all around the edges to flavor the meat. Place back in the oven for about 15 minutes.Take it out of the oven. If you want onions on your sliders then spoon them onto the meat from the sides. Add your cheese slices. Put it back in the oven for 7-10 minutes (until cheese is melted). Then add the tops of your rolls (the bottom part of the rolls will just sit on the counter) and place back in the oven for about 5 more minutes. Take it out of the oven. Slice the meat with a pizza cutter and pick up the slider/top bun with a spatula and set it on the bottom bun.