6 - medium-size crisp tart apples (Granny Smith or Braeburn), peeled if desired, cut into 1/2-inch-thick
1 - teaspoon ground cinnamon
1/2 - cup quick-cooking oats
1/3 - cup packed brown sugar
1/4 - cup all-purpose flour
1/2 - cup cold butter, cut into small pieces
1/2 - cup pecans, chopped
1/2 - cup toffee bits
Ice cream, if desired

• In large bowl, mix apples and cinnamon to coat. Add to slow cooker.
  
• In medium bowl, mix oats, brown sugar, flour and butter with pastry blender or fork until crumbly. 
• Stir in pecans and toffee bits. 
• Sprinkle crumb mixture evenly over apples.
  
• Cover and cook on LOW for 4 to 6 hours. Serve with ice cream.