Grilled Pears with Butterscotch Sauce

Yield:	4 Servings
Categories:	BBQ, Fruits, Desserts

4	lg	Firm-ripe anjou or Bartlett pears
3	tb	Fresh lime juice
2	tb	Granulated sugar
1/3	c	Evaporated milk
2	tb	Firmly packed light brown sugar
2	ts	Unsalted butter
1/2	ts	Vanilla extract