Warm Holiday Artichoke Spinach Dip

Warm Holiday Artichoke Spinach Dip

Ingredients 2 TBS olive oil 1 TBS butter 1 large onion, diced 2 cloves garlic, minced 2 TBS flour 1/2 cup broth (vegetable or chicken) 10 oz frozen spinach  
14oz can artichoke hearts, chopped 3/4 cup plain lowfat yogurt
1 cup parmesan 1/2 tsp cayenne salt &...