In a large bowl combine corn, jicama, cucumber, and tomato.
For dressing, in a blender or food processor combine lime sections, stone ground mustard, honey, dry mustard, salt, soy sauce, garlic, and cayenne pepper. Cover and blend or process until dressing is smooth. With blender or processor running, slowly drizzle in olive oil until combined.
Stir dressing into vegetable mixture. Cover and chill up to 4 hours until ready to serve. Serve with tortilla chips or crackers. Makes about 5-1/4 cups salsa.