Step 2

Preheat oven to 350 degrees. In a large saucepan, heat ¼ cup of wine and add portobello mushroom slices. Allow to cook through and brown a bit—you’ll need to keep moving them around and turning them—and then remove from pan and set aside.

Step 4

Add remaining ¼ cup wine to the pan and add onion and garlic. Caramelize onions by stirring until they wilt and begin to brown. Remove onions from pan and set aside.

Step 6

Mix flour, sage, and basil together in a small bowl. Stir in ¼ cup of broth to create a paste, and pour mixture into the same pan you used for mushrooms and onions. While stirring constantly over medium heat, slowly add remaining broth to create a sauce.

Step 8

When mixture starts to boil, turn off heat and add any additional seasonings. Add potatoes, carrots, salt, pepper, and Worcestershire sauce to the sauce. If more liquid is needed to keep the vegetables from drying out, add more broth.

Step 10

Add mushrooms and onions to mixture and ladle into a large ceramic or glass pot or casserole dish with a lid, layering on sprigs of rosemary and thyme. Add lid, place pan into oven, and bake for 1 hour. Remove from oven and serve hot.