How to make Sweet Potato and Orange Soup recipe

Ingredients

• 1 lb. (450 gr.) sweet potato (1 & 1/2 ~ 2 sweet potatoes)
• 2 tbsp. olive oil
• 1/2 medium size onion (chopped)
• 1 stalk of celery ( chopped )
• 1/4 tsp. oregano
• 1 can (14 oz.) chicken broth
• 1/4 tsp. salt
• 1 cup milk or evaporated milk
• 1/4 cup orange juice (about 1/2 orange)
• 1/8 tsp - 1/10 tsp orange zest (The outermost part of the rind of an orange)
• 1 cup water