Preheat oven to 425*
Chop vegetables, place in bowl with olive oil and garlic. Gently mix until vegetables are coated with oil.
Add juice and zest from lemons to bowl, gently mix. Season with salt and pepper.
Roast in oven until vegetables start to brown, about 20 minutes.
Meanwhile, cook brats in a pat of butter on the stove.
When cooked through, remove from pan, slice into bite sized pieces.
Deglaze pan with beer, add brat slices and cook down until the beer is reduced and thickened.
Pour beer and brat mixture over roasted vegetables, roast additional 10 minutes or until brats are sizzling.