Cheesy Italian Tortellini in the crock pot

Inspired from http://tastycrockpotrecipes.net/recipes2/article1136.html

 How good does this sound!!?! And easy :)

INGREDIENTS

• 1 pound ground beef 
• 1 container marinara sauce (15 ounces)
• 1 cup sliced fresh mushrooms
• 1 can diced tomatoes, undrained
• 3/4 tbsp Italian seasoning
• 1 tsp garlic powder
• 1 package refrigerated cheese tortellini (9 ounces)
• 1 cup shredded mozzarella or pizza style cheese

DIRECTIONS

1. Cook beef over medium heat until brown. Drain grease.
2. Spray inside of slow-cooker with cooking spray then add beef , marinara sauce, mushrooms and tomatoes.
3. Mix, then cover and cook on low 7 to 8 hours. 
4. Stir in tortellini and sprinkle with cheese. 
5. Cover and cook on low another15 minutes, until tortellini is tender.