Baked Beans (Dena's)

I hope you don't mind me just taking your stuff and posting it, but these are so yummy and every time I make them I get a request for the recipe. So here goes, please feel free to tweak this post however you want to :)

1 lb ground beef
1 onion diced
2 cans beans (one dark one light kidney beans work well)
1 can tomato soup
Mustard powder ~ 2 tbs
Brown sugar ~ 2 tbs
S&P to taste

Adjust the mustard and sugar to how ever you like things to taste. As usual, I also add some garlic.
Brown beef, drain and add onions (and garlic if using) cook until onions soften. Add the remainder of the ingredients and heat through.