An easy and delicious stroganoff, made with ground beef, mushrooms, and sour cream.
Ingredients:

2 teaspoons olive oil
2 teaspoons butter
1 large onion, chopped
8 ounces sliced mushrooms
1 pound lean ground beef
2-3 tablespoons all-purpose flour
1 cup beef broth
1/2 teaspoon salt
2 tablespoons ketchup
1 cup (8 ounces) sour cream

Directions:

Saut