Spinach and Bacon Salad

Ingredients 12 slices bacon 4 (1-ounce) slices Fresh bread, cut into cubes 6 cups fresh spinach leaves 1 small head radicchio, separated into leaves 1/2 cup sliced green onions 3 ounces goat cheese 1/3 cup red wine vinegar 1/3 cup vegetable oil 1 tablespoon sugar 3/4 teaspoon dry mustard 1/4 teaspoon salt 1/4 teaspoon pepper