Portobello Mushroom Stroganoff

Name: [Portobello] Mushroom Stroganoff
Ingredients: * 2 tsp olive oil; * 2 tsp butter; * 1 large sweet onion, finely chopped; * 2 large clove garlic, minced; * 2 lb baby portabello mushroon, cleaned and sliced thick (or 4 large; portobello); * 1 tsp kosher salt; * 1/4 cup flour; * 1 tsp paprika; * 1/4 tsp freshly ground pepper; * 3/4 cup white wine (i use riesling or 1/2 cup white grape; juice and 1/2 cup water); * 1/2 cup vegetable broth; * 1 tbl worcestershire sauce (vegetarian); * 3 cup fresh baby spinach leaf; * 1/2 cup light sour cream