Halibut with thyme

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[...]

6 tablespoons butter , divided 1 1/2 lbs boneless halibut steaks , cut into 1-inch cubes 2 garlic cloves , minced or 1/2 teaspoon garlic powder 3/4 teaspoon[...]

2 lbs halibut 1/2 cup onion , chopped 1 garlic clove 1/4 cup green pepper , chopped 3 celery ribs , sliced diagonally 3 carrots , julienned 2 lbs canned[...]