2lbssturgeon bones and headcleaned of all blood the filets cut in 6" x 3" pieces
4cupswater
2tbspunsalted butter
1/2cupfinely chopped onion1/4 pound
1/4lbmushroomscut into 1/4-inch slices
5shallotspeeled
1carrottrimmed, peeled and sliced in food processor
1celery stalktrimmed, strung and sliced across in food processor
1leektrimmed, well rinsed and sliced across in food processor
1parsnippeeled and sliced across in food processor
2tspBasic Tomato Paste or canned tomato paste
2tspcapers
1tbsppitted and chopped Kalamata olives
3sour pickleschopped
Large pinch freshly ground black pepper
1tbspkosher salt
Instructions
Place fish bones, head, and water in a 2-quart soufflé dish. Cover tightly with microwave plastic wrap. Cook at 100% for 25 minutes. Strain broth and set aside (you will have about 4 cups).
Heat butter in a 14"x 11"x2" dish, uncovered, at 100% for 2 minutes. Stir in onion and mushrooms. Cook, uncovered, for 4 minutes longer.
Remove from oven. Arrange sturgeon on top of onion mixture in a single layer. Scatter shallots and sliced vegetables over fish. Pour reserved broth over all. Cover tightly with microwave plastic wrap. Cook at 100% for 18 minutes.
Remove from oven. Uncover and stir in remaining ingredients. Serve hot.