1 head cauliflower, cut into florets
1 large red bell pepper, cut into 1-1/2 inch pieces
1 red onion, sliced
1/2 cup chopped fresh dill
3 tablespoons balsamic vinegar
2 tablespoons white wine vinegar
2 teaspoons olive oil
salt and pepper to taste
Combine the cauliflower, bell pepper, onion, dill, balsamic vinegar, white wine vinegar, and olive oil in a large resalable bag; shake bag to evenly coat. Allow to marinate in refrigerator 1 to 2 hours, turning bag occasionally.
Preheat oven to 450 degrees F (230 degrees C).
Open the bag and season with salt and pepper; reseal the bag and shake again to coat. Pour into a 9×13 glass baking dish.
Bake in the preheated oven until tender, about 30 minutes, stirring occasionally.