Preheat oven to 350°F (180°C). Remove mushroom stems and finely chop. Melt 3 Tbsp. (45mL) butter in small skillet. Add chopped mushrooms stems, onion, celery, and Mrs. Dash® Garlic & Herb. Cook over medium heat about 10 minutes or until golden brown. Remove from heat; stir in bread crumbs and sour cream. Spoon lightly into mushroom caps. Arrange stuffed mushrooms on baking sheet. Melt remaining butter and combine with lemon juice. Drizzle over stuffed mushrooms. Bake 15-20 minutes or until golden brown.