Cauliflower Broccoli Salad

Ingredients

• 1 medium head cauliflower, broken into florets (about 7-1/2 cups)
• 1 medium bunch broccoli, cut into florets (about 4 cups)
• 2 cups seedless red grapes
• 6 green onions with tops, sliced
• 2 cups shredded part-skim mozzarella cheese
• 2 cups mayonnaise
• 1/4 cup grated Parmesan cheese
• 2 tablespoons sugar
• 2 tablespoons white vinegar
• 1/2 to 1 pound sliced bacon, cooked and crumbled