Broccoli-Cauliflower Salad

1 cucumber, peeled
1 cup acceptable mayonnaise
2 TB white wine vinegar
1 garlic clove, pressed
1 TB Splenda
1 teaspoon salt
1 lb cauliflower, coarsely chopped
1 lb broccoli, coarsely chopped
4 green onions, sliced

Cut cucumber in half lengthwise, and thinly slice. Whisk together mayonnaise and next 4 ingredients in bowl. Add cucumber, cauliflower, broccoli, and green onions, tossing well. Cover and chill for at least 4 hours.