Spinach Salad with French Vinaigrette - Cooking with Kids

Ingredients

• 1 teaspoon Dijon style mustard
• 2 tablespoons lemon juice
• 1 tablespoon red wine vinegar or cider vinegar
• ¼ teaspoon salt
• ⅛ teaspoon black pepper
• ⅓ cup olive oil
• 5 ounces baby spinach
• 1 head Boston lettuce or ½ head Romaine lettuce
• 2 cucumbers, peeled and thinly sliced
• ½ fennel bulb, optional