Yellow Squash and Onions

I had these in North Carolina when I was there this spring.  It seemed like a fitting way to use the yellow squash that has been building up and to accompany a Southern entree. 

Serves 3

1/2 tablespoon butter
1/2 tablespoon olive oil
1 slice onion, cut into bite-sized pieces
2 small yellow squash, cut into coins
Dash garlic salt
Dash salt
Dash ground black pepper

1. In skillet, heat butter and olive oil over medium heat. Add onion and squash and saute until edges are brown and vegetables are soft.  Season with garlic salt, salt, and pepper.  Serve hot.