Leek and Spinach Risotto

Name: Leek and Spinach Risotto
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: American, Italian
Ingredients: 2 tablespoons unsalted butter; 1 tablespoon olive oil; 1 large shallot (diced); 3 leeks (sliced); 3 cloves garlic (diced); 1 cup Arborio rice; 1/2 cup white cooking wine (optional ); 4 cups vegetable stock (warmed); 1/2 teaspoon salt; 1/2 teaspoon ground black pepper; 2 teaspoons fresh thyme; 1/2 cup parmesan cheese (grated); 2 cups fresh spinach; 2 teaspoons lemon zest