Tofu Cutlets Marsala

1/4 cup all-purpose flour

1/4 teaspoon salt

1/4 teaspoon freshly ground pepper

1 14-ounce block extra-firm tofu, drained, rinsed and cut crosswise into eight 1/2-inch-thick slices

4 tablespoons extra-virgin olive oil, divided

2 large shallots, minced

1 teaspoon dried thyme

6 cups sliced cremini or white mushrooms (about 10 ounces)

1/2 cup dry Marsala wine (see Ingredient note)

1 cup vegetable broth or reduced-sodium chicken broth

1 tablespoon tomato paste