sweet onion & cucumber salad w/ creamy tomato dres

Ingredients

• 1/4 cup canned crushed tomatoes with puree
• 1/4 cup creme fraiche or sour cream
• 1/4 cup mayonnaise
• 1/4 cup buttermilk
• 3 tablespoons dijon mustard
• 2 teaspoons fresh chives or green onions, chopped
• 2 teaspoons fresh parsley, chopped
• 2 teaspoons fresh basil or 3/4 teaspoon dried, chopped
• 2 teaspoons fresh cilantro, chopped
• 2 teaspoons lime juice
• 1 1/2 teaspoons shallot, minced
• 1/2 teaspoon garlic, minced
• 8 cups mixed baby greens
• 1 small maui onion or sweet white onion, thinly sliced
• 1 - cucumber, peeled and sliced