Roasted Vegetables

Preheat oven to 400 degrees. Slice the peppers lengthwise. Thinly slice the onion. Slice the mushrooms and mince the garlic. Put all the ingredients on a foil covered baking sheet (makes cleanup a snap). Sprinkle with olive oil and a generous portion of balsamic vinegar. Roast about 1 1/2 hours or until the peppers are soft. Place in serving bowl and throw away the foil.