Gruyere-bacon dip

This is absolutely delicious--dip with crackers or vegetables.

1/2 c chopped onion
4 oz. shredded Gruyere cheese
1/2 c mayonnaise
1 t Worcestershire sauce
1/2 t dry mustard
1/8 t pepper
8 oz cream cheese, softened
2 T sliced green onion
4 slices bacon, cooked and crumbled

Saute onion until soft.  Put in small (2 1/2 qt) slow cooker.  Add Gruyere, mayonnaise, Worcestershire, mustard, pepper and cream cheese.  Stir until blended.  Cover and cook on low for 1 1/2 hours, stirring halfway through.  Top with green onions and bacon.