1/2 cup dried porcini mushrooms (about 1/2 ounce)
4 (6-ounce) skinless, boneless chicken breast halves
4 teaspoons all-purpose flour, divided
3/4 teaspoon salt, divided
1/4 teaspoon freshly ground black pepper
2 tablespoons olive oil, divided
1/2 cup chopped onion
1/4 teaspoon crushed red pepper
5 garlic cloves, thinly sliced
1 1/2 cups thinly sliced shiitake mushroom caps (about 4 ounces)
1 1/2 cups thinly sliced button mushrooms (about 4 ounces)
1 teaspoon dried oregano
1/2 cup dry Marsala wine
2/3 cup fat-free, lower-sodium chicken broth
1 cup halved cherry tomatoes
1/4 cup small fresh basil leaves