Halibut with butter

1 onion 1 green pepper 1 cup sliced mushrooms 2 garlic cloves , minced 2 stalks celery 2 carrots , sliced 1/2 cup cauliflower , pieces 1/2 cup broccoli floret[...]

2 tablespoons butter 1 garlic clove , minced 1 cup coarse fresh breadcrumb 2 teaspoons minced fresh tarragon 1 teaspoon finely grated lemon zest 1/4 teaspoon[...]

1 tablespoon extra virgin olive oil 1 large Spanish onion , chopped 1 large leek , white and tender green parts, halved lengthwise and sliced crosswise 1/4[...]