Small head of cabbage, grated
1 carrot, grated
1 small bell pepper, chopped
1 to 2 teaspoons dehydrated onion flakes
2 tablespoons (or more) Tarragon vinegar
1 teaspoon (or more) Garlic salt
1/2 cup Hellman’s mayonnaise
Pinch of sugar
Chopped parsley (for garnish)