Picnic Slaw

Ingredients

• 1/4 c. apple cider vinegar
• 1/4 c. sugar
• 1 Tbsp. chopped red onion
• 1/2 tsp. salt
• 1/2 tsp. Dijon-style mustard
• 1/4 tsp. garlic
• 1/4 tsp. pepper
• 1/2 c. vegetable oil
• 2 tsp. poppy seed
• 2 Tbsp. green onion
• 1 lb. red cabbage
• 1 lb. green cabbage
• 1 large carrot
• 1 tsp. celery seed