Crock Pot Spinach Artichoke Dip

8 oz frozen artichoke hearts
1 T butter
1 small yellow onion, finely chopped
3 cloves garlic, finely chopped
6 oz fresh baby spinach, finely chopped
2 -8 oz pkg cream cheese at room temp, cubed
6 oz finely shredded parmesan
1/2 c mayo
1/4 t cayenne pepper
1/4 t salt

Prepare artichokes according to package, drain and cool, coarsely chop and set aside.
2. Melt butter in skillet, add onion and cook 3 minutes. Stir in garlic and spinach. Cook additional 5 min or until spinach is wilted and onions are soft. Remove from heat.
3. Stir in artichokes and remaining ingredients.
4. Place in slow cooker on low for 2 hours or until cheese is bubbly.
Serve with baguettes.