Vegetable Paella

Name: Vegetable Paella
Ingredients: 1/4 cup extra-virgin olive oil; 2 cups cauliflower florets; Kosher salt and freshly ground pepper; 1 8-ounce package sliced mixed mushrooms; 3 scallions, sliced (white and green parts separated); 3 cloves garlic, chopped; 1 teaspoon mild smoked paprika; 1/2 cup dry white wine; 1 1/2 cups short-grain Spanish or arborio rice; 1 large jarred roasted red pepper, cut into strips; 10 pitted black and/or green olives, halved; 2 tablespoons chopped fresh parsley