Savory Ham Wraps

Ingredients

• 1/4 cup mayonnaise
• 1 tablespoon milk
• 3/4 teaspoon sugar
• 1/4 teaspoon prepared mustard
• 1/8 teaspoon celery seed
• Dash salt
• 2 flour tortillas (10 inches), room temperature
• 1/4 pound thinly sliced deli ham
• 1/3 cup shredded Swiss cheese
• 2/3 cup shredded lettuce
• 1 medium tomato, seeded and chopped
• 1 green onion, chopped