Easy Stuffed Mushrooms

Name: Easy Stuffed Mushrooms
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Cuisine: World Cuisine
Ingredients: 1 1/2 pounds cremini mushrooms, aka baby bella (3 8-ounce packages or 20 to 24 mushrooms); 1 tablespoon olive oil; 3/4 teaspoon kosher salt, divided; Fresh ground black pepper; 3 tablespoons shallot, finely minced; 1/4 cup finely chopped walnuts (or omit and substitute more breadcrumbs); 2 tablespoons finely minced parsley; 1/2 cup Italian panko or breadcrumbs (gluten-free as necessary)*; 1/2 cup grated Parmesan cheese; 1/2 teaspoon garlic powder; Paprika or smoked paprika, for the garnish