Pea and Bacon Salad with French Dressing

Name: Pea and Bacon Salad with French Dressing
Ingredients: 1/2 cup ketchup; 1/2 cup full-fat Greek yogurt; 1/3 cup white wine vinegar; 2 teaspoons Dijon mustard; 1 tablespoon sugar; 1 teaspoon paprika; 1/2 small onion, coarsely chopped; Kosher salt; 4 slices bacon; 6 ounces sugar snap peas, stringed and cut on the bias (about 3 cups); Kosher salt and freshly ground black pepper; 1 head butter lettuce, torn into leaves; 1/4 cup fresh Italian parsley leaves, chopped; Wedge of Parmesan, for grating