In a Dutch oven, over medium heat, heat 1 tablespoon oil .
Brown roast on all sides; remove from pan.
In the same pan, heat remaining oil; add onions and garlic; cook and stir until tender. .
Add beer, stirring to loosen browned bits from pan.
Stir in mushrooms, brown sugar, Worcestershire sauce and savory.
Return roast to pan; bring to a boil; reduce heat; simmer, covered, 1-1/2 hours.
Stir in remaining ingredients; return to a boil; reduce heat; simmer, covered, 15 to 25 minutes longer or until meat and vegetables are tender.
If desired, skim fat and thicken cooking juices for gravy.