Green Salad with Homemade French Dressing

Name: Green Salad with Homemade French Dressing
Ingredients: 2 stalks celery, sliced; 1 European-style cucumber, sliced into half moons; One 4-ounce log goat cheese, crumbled; 1 head butter lettuce, torn; 1 head romaine lettuce, chopped; 1 pint cherry tomatoes, halved; 1/4 cup ketchup; 1/4 cup white wine vinegar; 1 tablespoon low-fat sour cream; 1 teaspoon dry mustard; 1 teaspoon Worcestershire sauce; 1/2 teaspoon paprika; 1/4 teaspoon cayenne pepper; Juice of 1/2 lemon; 1/4 cup canola oil; Kosher salt and freshly ground black pepper