Slow Cooker Chicken and Broccoli

INGREDIENTS
1 1/2 lb. boneless skinless chicken breasts, cut into bite size pieces
1 medium onion, chopped
2 c. low-sodium chicken broth
1 c. heavy cream
1 tsp. garlic powder
1 tsp. dried oregano
1 head broccoli, cut into bite size pieces
1/2 lb. egg noodles
2 tbsp. Unsalted butter
1 c. shredded cheddar cheese
Round Crackers (like Ritz) crushed for garnish (optional)
Parley, chopped for garnish (optional)
INSTRUCTIONS