Greek Lettuce Salad

Ingredients

• 6 cups torn romaine
• 1 cup chopped tomato
• 3/4 cup thinly sliced red onion
• 3/4 cup cubed cucumber
• 3/4 cup cubed feta cheese
• 18 pitted kalmata or ripe olives
• 3 tablespoons olive oil
• 1 tablespoon lemon juice
• 1-1/2 teaspoons dried oregano
• 1-1/2 teaspoons prepared mustard
• 1/4 teaspoon salt