Here's a good sauce to use with beef or poultry. It's very easy and made with stuff you probably already have on hand. Feel free to tinker with it too.
1/2 cup Heinz ketchup
1/2 cup Heinz vinegar (gf)
1/2 cup sugar or sweetener
1/2 cup water (more or less to adjust how thick or thin you want the sauce)
Mix in a bowl. That's it.