Fish with Herbs

INGREDIENTS
Part 1
2    tablespoons butter
2    cups sliced mushrooms (about 4 medium)
1    cup chopped white onion

Part 2
1    pound fish fillets (halibut, flounder, tilapia, etc.) about 3/4 to 1 inch thick
1    tablespoon olive oil
1/2 teaspoon dried savory or chervil
1/2 teaspoon dried thyme
1/2 teaspoon tarragon
1/4 cup low fat yogurt
      smoked paprika
      lemon slices

METHOD
Part 1 is optional, so you can do  Parts 1 and 2 or just part 2. Either way, preheat the oven to 350 F degrees.

Part 1.  In a medium skillet, melt the butter over low heat. Add the onion and simmer for 4 to 5 minutes. Add the mushrooms and stir to cover with the butter. Remove from the heat and place into a shallow oven-proof baking dish. Smooth them out to cover the entire bottom of the dish.

Part 2. If doing part 1, place the fish on top of the mushroom and onion mix in the shallow baking dish. If not doing part one, rub a little olive oil on one side of the fish fillets and place them oiled-side-down in a shallow baking dish. In a medium bowl, combine the olive oil, the three spices and the yogurt. Mix well and spread evenly over the fish fillets. Sprinkle the fish with a little smoked paprika, add one or two lemon slices to each files and sprinkle them with a little paprika. Bake uncovered in the middle of the oven for 25 to 30 minutes until the fish flakes easily. Remove from the oven and place onto serving plates and serve. The lemon slices can be discarded if so desired.