Beef with chuck

1 lb lean beef chuck , trimmed and cut into cubes 2 tablespoons all-purpose flour 2 teaspoons vegetable oil 2 large yellow onions , thinly sliced 2 cups[...]

1 cup day-old sourdough bread cubes (crust removed) 1 cup whole milk 2 tablespoons extra virgin olive oil 1 medium red onion , finely chopped 8 ounces ground[...]