Grilled Steak and Onion Salad - With fruit

1/2 cup olive oil 6 tablespoons white balsamic vinegar 1 3/4 teaspoons dry mustard, divided 1 tablespoon dark brown sugar 1 2-pound well-trimmed tri-tip beef[...]

1 1/2 tablespoons balsamic vinegar 1 small garlic clove , minced 4 tablespoons olive oil table salt & fresh ground pepper 1 large red onion , cut crosswise[...]