Beef Tips without whites yogurt

2 cups beef, sirloin steak cubed, trimmed, of all visable fat * 2 teaspoons olive oil 1 medium yellow onion chopped 2 cups mushrooms sliced 1 clove garlic[...]

1/2 cup flour, all-purpose 1 teaspoon salt 1/8 teaspoon black pepper * 4 pounds beef, sirloin tip 1/2 cup scallions, spring or green onions chopped 2 cups[...]